Laura Dershewitz has published several children's books but is a relative newcomer to the crossword game. I believe this is only her second solo puzzle in the LAT.
This theme is rather dense (or I am!). It took a paragraph to explain it and it still wasn't clear to me. In the end, I think this is just a list of kinds of SPACEs, and the THIRD one happens to be in the position foretold by the revealer. Any of them could have landed in that slot and made no difference. I tried to sequence them into some sort of "series," but that was a red herring.
56. Gathering place that's neither work nor home, or an apt description of 36-Across in the series that includes 17-, 24-, and 46-Across: THIRD SPACE. A THIRD SPACE (or Third Place) refers to social surroundings that are separate from the two usual social environments of home (first place) and work (second place), such as churches, clubs and gyms. It's often the one that you choose to belong to with people who share your interests, fostering civic life.
17. Leeway: WIGGLE ROOM. → Extra SPACE. This gives one the flexibility to deviate from a plan and make adjustments or allow for errors.
24. Hard-to-find opening on street-sweeping days: PARKING SPOT. → Parking SPACE. A little different from the others as it can only be described by using the same word as in the clue.
36. Low Earth orbit, for one: SATELLITE LOCALE. → Outer SPACE. This is also the THIRD themer about SPACE per the revealer.
46. Period of quiet reflection: TIME TO THINK. → Head SPACE. A person's current emotional state, often implying a need to eliminate mental clutter to process thoughts.
Pretty easy for a Thursday, with lots of short fill and many abbreviations (!) necessitated by the five themers. But I liked learning about the social construct of a THIRD SPACE, so that's a plus.
And now, off to the wide open SPACES:
Across:
1. Some pricey insulated mugs: YETIS. These are very good, but are they that much better than other steel double-walled insulated coffee mugs available at half the price?
6. Juicer byproduct: PULP.
10. Keeps posted privately: BCCS. Abbrev. #1. Blind Carbon CopieS on emails.
14. Buzz word?: APIAN. APIAN is an adjective meaning relating to bees. Buzzy bees!
15. Potatoes, in Indian cuisine: ALOO. ALOO is becoming the "Oreo" of contemporary xwords.
16. "No way, no how!": UH-UH. The opposite of UH-HUH.
17. [theme]
19. Title fit for a king: SIRE. Title fit for King: B.B. (aka the Beale Street Blues Boy).
20. Possible title for a B-school grad: CEO. Abbrev. #2. Chief Executive Officers often graduate from Business schools, then suddenly are worth hundreds of times more than the COGs who work there.
21. Cam button: REC. Abbrev. #3. RECord button on a video camera.
22. Spine-tingling: EERIE. This one is very strange...
23. Hair of the dog?: FUR. Fun clue!
24. [theme]
27. Tickling targets: ARMPITS. ...and there's something funny about this one.
29. Small part of a machine: COG. In 1962, The Jetsons envisioned a future where we all work for a few very wealthy people. Prophetic.
30. Grease again: REOIL. Odd looking word that isn't used much.
31. Part of WYSIWYG: SEE. This abbreviation is only in the clue, so it gets a pass. Pronounced wizzy-wig, the acronym for "What You SEE Is What You Get" originated with software whose displayed image closely resembled its final user appearance.
32. Graceful waterbird: SWAN.
36. [theme]
40. With sharp resolution: IN HD. Abbrev. #4. IN High Definition.
41. Seer's gift: ESP. Abbrev. #5. ExtraSensory Perception, often called the "sixth sense."
42. Actress Berry: HALLE. HALLE Berry won the Oscar for Best Actress in 2002 for her role in Monster's Ball, making her the first and, to date, only Black woman to ever receive this award.
43. __ Arbor, Michigan: ANN. ANN Arbor is home to the massive (50K+) University of Michigan, the 9th largest university in the U.S.
44. Troublemaker's opposite: GOOD KID. Like my boys, the little angels.
46. [theme]
51. Western treaty gp.: OAS. Abbrev. #6. The Organization of American States is a group of 34 member countries from North, Central, and South America.
52. Project on stage: EMOTE.
53. Alphabet starter: ABC. Three letters, but not really an abbreviation.
54. Travel stop: INN. Holiday Inns used to be ubiquitous along the highways of America. My parents took us on extended summer trips in our old station wagon (no AC!), often staying there or under the orange roof of a Howard Johnson.
55. Drive-__: THRU. Abbrev. #7. Ad-speak for "through."
56. [theme]
60. Melon covering: RIND.
61. __ bene: NOTA. Latin for "note well."
62. Wickerwork twig: OSIER. A small Eurasian willow that grows mostly in wet habitats.
63. Altar alcove: APSE.
64. Mattress choice: TWIN.
65. Inferior: WORSE.
Down:
1. Swerve off course, as a ship: YAW. YAW, along with pitch and roll, also describes the same motions in aircraft.2. Fond of fine food and drink: EPICUREAN.
3. Insect with striped wings: TIGER MOTH. My grandmother used to call moths "millers." I always thought it was because they milled around lights, but looking it up now (the internet wasn't available when I was a wee lad) I see it was due to their fine scales that rub off, resembling the dusty flour on millers' clothing.
4. Othello's betrayer: IAGO.
5. "Weekend Update" show, for short: SNL. Abbrev. #8. Saturday Night Live.
6. Apple gadgets: PARERS. I wasn't fooled by the tech misdirect, but still wrote "corers" first.
7. Horseshoe-shaped security device: U-LOCK. A letter-shaped descriptor, like T-shirt, is not an abbreviation.
8. Bathroom, in Bath: LOO.
9. Fluffy pup: POM. Abbrev. #9. Pomeranian.
10. School fleet: BUSES.
11. Keyless entry sound: CHIRP.
12. Knickknack: CURIO. A knickknack is bric-a-brac!
13. Paper unit: SHEET.
18. Latin 101 verb: ERAT. ERAT is the third-person singular imperfect tense of the verb esse (to be), meaning "he/she/it was." I knew taking Latin in high school would come in handy one day!
22. What applesauce may replace in vegan baking: EGG. Unsweetened applesauce can be an EGG replacement in many baking recipes, primarily functioning as a binder and adding moisture.
23. Tehran tongue: FARSI.
24. Tablet: PILL.
25. Frozen treat served with a stroon: ICEE. It's a straw! It's a spoon! It's a STROON!!
26. Yuletide: NOEL. NOEL means Christmas in French, stemming from the Latin for "birth."
28. Like a calico cat: PIED. PIED describes an animal having two or more colors.
31. Fuel additive brand: STP. Abbrev. #10. Scientifically Treated Petroleum.
32. Whole bunch: SCAD. Usually used in plural as in "SCADs of abbreviations."
33. Feel euphoric: WALK ON AIR.
34. Close associations: ALLIANCES.
35. Must-haves: NEEDS.
37. TV host Jay: LENO. Nowadays, he's noted for his vast automobile and motorcycle collection. And to think RightBrain says I have too many guitars! Just kidding, she lets me have my toys because they don't take up garage space.
38. "That __ true!": ISN'T. Abbrev. #11. Is not.
39. "Now I understand": OH OK. OK is oddly not an abbreviation. Okay came later, OK?
43. Was full of beans, maybe?: ATE. "Full of beans" usually means one is lively and enthusiastic.
44. "The Prophet" author Kahlil: GIBRAN. "The Prophet" is a 1923 poetry collection where different people in a town ask a prophet his opinion on anything: marriage, death, love, generosity, etc.
45. Like many audiobooks, once: ON CD. Abbrev. #12. ON Compact Disc. Some people debate whether listening counts as reading. I say yes, what do you think?
46. Colorful aquarium fish: TETRA.
47. "Got it, dude!": I'M HIP. Abbrev. #13. I am HIP.
48. Daybreaks, poetically: MORNS. Abbrev. # 14. Short for MORNings.
49. Piano student's assignment: ETUDE. An ETUDE (French for "study") is primarily a musical composition for practicing a technical skill, such as rhythm or dynamics. Here's a simple exercise for beginners by Chopin to help build finger dexterity.
50. Creole-speaking nation: HAITI.
54. __ facto: IPSO. That's a fact!
56. Demo stuff: TNT. Abbrev. #15. TriNitroToluene is a powerful explosive sometimes used in demolition.
57. "Please explain": HOW.
58. Female pig: SOW.
59. Afore: ERE.
And now we're out of space!
Be good. RB

















