Theme: GEAR SHIFTS. G-E-A-R is rearranged and spread across two words. I'm not sure why 18A does not have circles, but I included it in the theme answers below.
23. Progress at a faster rate: FORGE AHEAD.
18. Region where broadcast reception may be poor: FRINGE AREA.
23. Progress at a faster rate: FORGE AHEAD.
37. Army rank last conferred in 1950: FIVE STAR GENERAL. Where have all the 5-star generals gone?
52. Riot control weapon: TEAR GAS GUN.
59. Automatic functions in most cars, and what can be found in this puzzle's circles: GEARSHIFTS.
Across:
1. Low poker pair: TWOS.
5. Mus. key with three sharps: A MAJ. From Wikipedia: A major (or the key of A) is a major scale based on A, with the pitches A, B, C♯, D, E, F♯, and G♯. Its key signature has three sharps.
9. Nigerian seaport: LAGOS.
14. Greet with fanfare: HAIL.
15. Pizza Quick sauce brand: RAGU.
16. "You've got a friend": I CARE.
17. First name in scat: ELLA. Fitzgerald.
20. Mix: BLEND.
22. Former Soviet leader Brezhnev: LEONID. From Wikipedia: served as General Secretary of the Central Committee of the
governing Communist Party of the Soviet Union from 1964 until his death
in 1982. His 18-year term as general secretary was second only to Joseph
Stalin's in duration.
26. Prefix with tourism: ECO. A form of sustainable travel that supports the local environment instead
of putting more pressure on it and exploiting its resources. See here.
29. Navigation technology, briefly: GPS. Global Positioning System. I'd be lost without it.
30. Brooding genre: EMO.
31. "Spartacus" Oscar winner: USTINOV. Ustinov won for his portrayal of Roman businessman Lentulus Batiatus. Learned from Wiki: In the climactic scene, recaptured slaves are asked to identify
Spartacus in exchange for leniency; instead, each slave proclaims
himself to be Spartacus, thus sharing his fate. The documentary Trumbo suggests that this scene was meant to dramatize the solidarity of those accused of being Communist sympathizers during the McCarthy Era who refused to implicate others, and thus were blacklisted.
34. Bowler's pickup: SPARE. Boomer!
36. Amtrak express: ACELA. Amtrak's flagship service along the Northeast Corridor in the
Northeastern United States between Washington, D.C. and Boston via 14
intermediate stops, including Baltimore, Philadelphia, and New York
City.
44. Sent a message, old-style: TELEXED. Telex was a major method of sending written messages electronically between businesses in the post-World War II period.
47. Rock's Ocasek: RIC. Lead singer for The Cars, who died just 5 months ago at the age of 75 from natural causes.
48. Grow older: AGE.
51. Thorn __, former Virgin Records owner: EMI. Major British company involved in consumer electronics, music, defense and retail.
55. Arizona MLBers: DBACKS. Baseball - short for Diamondbacks.
58. Dig find: RELIC.
63. "Ciao!": TATA.
64. Take in eagerly: EAT UP.
65. Yule tune: NOEL.
66. Saroyan's "My Name Is __": ARAM. First published in 1940 - assigned reading in some schools - about a boy of Armenian descent growing up in Fresno, California, and the various members of his large family.
67. Collaborative 1993 Sinatra album: DUETS. Followed up in 1994 with the sequel Duets II, which was Sinatra's final studio album. Speaking of 17A Ella, her 1956 Ella and Louis [Armstrong] was another successful collaborative effort (how could it not be?).
68. Looking like rain: GRAY. I'm in Oregon. It's been mostly gray for months, although we do see some intermittent sun. I'm one of the freaks who likes long rainy stretches.
69. U. of Maryland athlete: TERP. Short for Terrapins. The terrapin is
a species of turtle native to the brackish coastal tidal marshes of the eastern and southern United States and Bermuda.
a species of turtle native to the brackish coastal tidal marshes of the eastern and southern United States and Bermuda.
Down:
2. Big hit: WALLOP. Ow.
3. Gretzky's first NHL team: OILERS.
4. Word on the street?: SLANG. Nice clue.
5. Canine greeting: ARF.
6. Tarnish: MAR.
7. Like gymnasts: AGILE.
8. Capital near Glacier Bay National Park: JUNEAU.
9. Property claim: LIEN.
10. Dark purple berry: ACAI. I unexpectedly spent (no joke) six hours at the Verizon store today. The agent who was helping me did not sound thrilled with his girlfriend's text update that they would be having acai bowls for dinner. After six hours I felt like we bonded.
11. Plant custodian: GARDENER.
12. Vein contents: ORE.
13. Briny expanse: SEA.
19. Neil Gaiman's "American __": GODS. I like Gaiman, but have never read this one. Fantasy is not my genre - anyone read it?
21. Get rid of: DEEP SIX.
24. Latin 101 verb: AMAT.
25. Circle dance: HORA. Known as the King of Israeli folk dances, it means round dance. Also called the chair dance, because the guests hoist up the bride and groom in chairs.
27. Cuba libre mixer: COLA. Drink also known as rum and coke.
28. Racecourse shape: OVAL.
32. Chemicals carrier: TANK CAR.
33. Treats, as a sprain: ICES.
34. Drought-plagued: SERE. Adjective meaning dry or withered.
35. Get an "Oh no" from Alex Trebek, say: ERR.
37. Inevitable end: FATE.
38. Tabloid couple: ITEM.
39. Stamp, as a passport: VALIDATE.
40. Teri of "Tootsie": GARR. Such a funny actress, who has dealt with health issues for many years. She bravely appeared on Late Night with David Letterman in 2008, to speak publicly about her battle with MS.
41. Vaping device, familiarly: E-CIG.
45. Mark on metal: ETCH.
46. Puck-handling skill: DEKING.
48. Shining brightly: AGLARE.
49. Instrument for The Romeros, a classical quartet: GUITAR.
50. Pitch tents: ENCAMP.
53. Regarding: AS FOR.
54. Tuned to: SET AT. My phone alarm is always SET AT my local NPR station.
56. Very dry, as Champagne: BRUT.
57. Nile vipers: ASPS.
59. H.S. dropout's test: GED.
60. __ de cologne: EAU.
61. Scone go-with: TEA.