Theme: Fresh start to the week - The start of the unifier can also be the start to the start of the theme entries.
17A. Enter like a debutante : BREEZE INTO. Fresh Breeze.
23A. Keep a lawn moist : WATER THE GRASS. Fresh Water
53A. Deflate the overconfidence of : CUT DOWN TO SIZE. Fresh Cut.
63A. New beginning ... and what the first words of 17-, 23- and 53-Across can literally have : FRESH START
Argyle here. I started an expo but spent my time on the write-up instead.
Across:
1. Single-celled lab specimen : AMEBA
6. Sultan of __: Babe Ruth : SWAT
10. Machine-mixed ice-cream beverage : MALT. Okay, snack time. 30A. Ring-shaped fried veggies : ONIONS. 40A. Round veggie : PEA. 69A. Roast, on le menu : RÔTI(rôti de bœuf). 44D. Asian dish topped with crushed peanuts : PAD THAI. 46D. Cereal served hot : OATMEAL. 50D. Fish eggs : ROE. 51D. Absorbs with bread, as gravy : SOPS UP. Some poi? 67D. Island party : LUAU. Thirsty? 21A. Toga party barrel : KEG
14. Sun-bleached : FADED
15. Pass in soccer but not in football : KICK
16. Singer India.__ : ARIE. 61 Rampy, if you're still with us, there's a nice Corvair in the video.
19. Debussy's "Clair de __" : LUNE
20. Focus of psychoanalysis : SELF
22. Vinyl collectible : ALBUM
27. Comedy duo Key & __ : PEELE. Keegan-Michael Key and Jordan Peele.
29. Midday snooze : SIESTA
32. __ on the back : PAT
33. Sting operation : TRAP
37. Where Hillary was a sen. : NYS. (New York State)
38. Airer of old films : TCM. (Turner Classic Movies)
42. Best pitcher in the rotation : ACE
43. Shocked reaction : GASP
45. Brazilian port : RIO
47. Search __: online tool : ENGINE
49. WrestleMania venues : ARENAs
52. Electroshock weapon : TASER
57. __ of the Union address : STATE
58. Velocity meas. : MPH
59. Pilate's "Behold!" : "ECCE!"
62. Georgia __ : TECH. Georgia Institute of Technology, one of the oldest and most respected polytechnical universities, is in Atlanta.
66. Vicinity : AREA
68. Hog hangouts : STIES
70. Shrill bark : [YELP!]
71. "Peter Pan" girl : WENDY
Down:
1. Homes for mil. jets : AFBs. (Air Force Base)
2. Female horse : MARE
3. Flower in a "Sound of Music" song title : EDELWEISS
4. Bovine hybrid : BEEFALO. Leftover from Sunday's puzzle?
5. Wood shaper with a broad blade : ADZ
6. Slalom racers : SKIERS
7. Men's dress shoe : WINGTIP
8. Work onstage : ACT
9. Boxing ref's ruling : TKO. (technical knockout)
10. Teen hanging out among shoppers : MALL RAT
11. Netherlands Antilles resort island : ARUBA
12. Lucy's blanket-toting brother : LINUS. "Peanuts" Their last name is van Pelt.
13. Swarms (with) : TEEMS
18. __ out: barely make : EKE
22. Ten-percenter: Abbr. : AGT. (agent)
24. Circus covering : TENT
25. Unlikely auto trade-in : HEAP. They have been known to have been donated to charities with a considrable inflated value.
26. Lauder of cosmetics : ESTÉE
27. Vintage video game : PONG
28. One-named Irish singer : ENYA. She did "Orinoco Flow" and Orinoco was in Sunday's puzzle.(part of a clue)
31. Carpentry fastener : SCREW
34. Engage in high jinks : RAISE CAIN
35. Unpopular spots in school? : ACNE
36. Social equal : PEER
39. Wisc. neighbor : MINN.
41. Not in favor of : ANTI
48. Texarkana daily : GAZETTE
53. Certain red giant : C STAR
54. In __: not yet born : UTERO
55. "Be silent," in music : TACET. Akin to TACIT.
56. "Be silent!" : "SHH!"
60. Rep on the street : CRED. (credibility)
61. Website featuring handicrafts : ETSY.com
63. Angler's lure : FLY
64. Deeply regret : RUE
65. NNE's opposite : SSW
Argyle