Theme: Quintessential Tuesday
20A. Period of meaningful interaction : QUALITY TIME
28A. "That's using your head!" : QUICK THINKING
46A. Planck's Nobel prize-winning formulation : QUANTUM THEORY. I know about as much about this as I do quarter-tones.
52A. Small musical interval sung in choral warmups : QUARTER-TONE. Classic dictionary entry. "quarter-tone : an interval equivalent to half of a semitone."
65A. Surreptitiously ... and a hint to 20-, 28-, 46- and 52-Across : ON THE QT
Argyle here. Big words Tuesday. Seven letter stacks in two corners. Two big chunks of black on the sides. All-over, not bad.
Across:
1. Reduce to mist : ATOMIZE
8. Insubstantial stuff : PAP
11. Intro deliverers : MCs. (master of ceremonies)
14. Short outing for a jogger : MILE RUN
15. From A to Z : ALL
16. The smile on a smiley face, say : ARC
17. Green gem : EMERALD
18. Where to leggo your Eggo? : TOASTER. Tinbeni is our toaster.
22. Having the wherewithal : ABLE. First thought? Rich.
26. Take to court : SUE
27. From square one : ANEW
33. Detach from the dock : UNMOOR
34. Sharply delineated, as a contrast : STARK
35. Egyptian snake : ASP
36. Actress Charlotte : RAE Or 60D. Stephen of "The Crying Game" : REA
38. __ Lanka : SRI. Tourist enjoying the beaches.
39. Scooby-__ : DOO
42. Living thing : BEING
44. Make responsible for, as chores : ASSIGN
48. Insulting remark : SLUR
50. Equal: Pref. : ISO
51. Carnivorous dinosaur, briefly : T REX
57. Let go : UNLOOSE
58. Movie equipment : CAMERAS
63. "O, __ fortune's fool!": Romeo : I AM (3.1.136)
64. Start to practice? : MAL. Malpractice.
66. 8-Down treaters: Abbr. : DRs. 8D. Waiting room waiters : PATIENTS
67. Get at a store : BUY
68. Traditional Yuletide quaff : WASSAIL
Down:
1. Soul, to Zola : ÂME. Zola, the French writer.
2. "A Christmas Carol" boy : TIM. Tiny Tim, Bob Cratchit's boy. Keep him away from the wassail.
3. Bullfight "Bravo!" : "¡OLÉ!"
4. Debussy's "La __" : MER
5. Syria neighbor : IRAQ
6. Last letter of a pilot's alphabet : ZULU
7. Mark similar to a hyphen : EN DASH. Traditionally half the width of an em dash.
9. Very much : A LOT
10. Be in the game : PLAY
11. Checking conclusively, in chess : MATING. Another strange definition.
12. __ de cacao : CRÈME
13. Carpentry fastener : SCREW
19. Performed really poorly : STANK
21. San __ Obispo, California : LUIS
22. Color of water : AQUA
23. Cookout supply : BUNS
24. Walk on a bad knee, say : LIMP
25. Novelist Umberto : ECO
29. Divided nation : KOREA
30. Teach a skill to : TRAIN
31. Jeweler's purity unit : KARAT
32. Dublin-born : IRISH
37. In every aspect : ENTIRELY
39. Couturier Christian : DIOR
40. Shrek, for one : OGRE
41. Black stone : ONYX
42. Grand Canyon pack animal : BURRO
43. Sudden wind : GUST
45. Chess pieces and board, e.g. : SET
46. Reservations : QUALMS
47. Barnyard animal, in totspeak : MOO COW. Now for something really different.
48. Ink squirter : SQUID
49. Like some ancient calendars : LUNAR
53. Mummy's home : TOMB
54. Genesis twin : ESAU
55. Grandma : NANA
56. CPR providers : EMTS. (CardioPulmonary Resuscitation/Emergency Medical Technicians)
59. Canadian interjections : EHs
61. EPA concern : AQI. (Air Quality Index)
62. Arch city: Abbr. : ST. L. (St. Louis)
Argyle