Theme: Limited-time retail offer - Save some moola maybe.
38A. Big sale, where you can find the starts of 18-, 23-, 49- and 60-Across: SHOPPER'S DELIGHT
18A. "Just handle the problem!": DEAL WITH IT
23A. Upstage one's co-stars: STEAL A SCENE
49A. Employ stalling tactics: BUY SOME TIME
60A. Take into account: BARGAIN FOR
Argyle here with GG&BV. Not much to say (except brrr). A nice grid-spanning reveal.
Across:
1. Rides for hire: CABs
5. Rapids transports: RAFTs
10. Toothed tonsorial tool: COMB. Fun alliteration.
14. Treaty partner: ALLY
15. Open courtyards: ATRIA
16. "So that's what you mean": "I SEE"
17. Shakespearean king: LEAR
20. Jam session jammer: MUSICIAN
22. Signs of sadness: TEARS
26. Tavern brew: ALE
27. Some motorcycles and pianos: YAMAHAs. Logo History.
32. Lawn-wrecking pests: MOLEs
36. Sewn edge: HEM
37. __ president: VICE
42. Mongolian desert: GOBI
43. No-frills sleeper: COT
44. Fire pit particles: ASHES
45. '70s-'80s band with a steering wheel on their debut album cover: THE CARS
47. Google success: HIT
55. Pro on camera: ACTOR
59. Like some rays outside the visible spectrum: INFRARED
63. Fill fully: SATE
64. Qatari ruler: EMIR
65. British unit of length: METRE
66. Hall of Famer Musial: STAN.(baseball)
67. Relaxed gait: LOPE
68. Old West search party: POSSE. "Head 'em off at the pass!"
69. Narrow-bodied swimmers: EELs
Down:
1. Brings peace to: CALMS
2. Native Alaskan: ALEUT
3. Having a been-there-done-that attitude: BLASÉ
4. War-torn country since 2011: SYRIA
5. Goodyear offering: RADIAL
6. "Relax, soldier": "AT EASE"
7. Pre-euro Metz money: FRANC
8. Up to, in ads: TIL. Limited-time offer. But if you call in the nexzt five ....
9. Got a look at: SAW
10. Use as a reference: CITE
11. Workplace standards org.: OSHA. (Occupational Safety and Health Administration)
12. Israel's Golda: MEIR
13. Puts money (on): BETS
19. To-do list entry: ITEM
21. Envelope fastener: CLASP
24. Looked at closely: EYED
25. Birth certificate datum: NAME
28. "We Try Harder" car rental chain: AVIS
29. Air conditioner setting: HIGH. My air conditioner setting is in the closet.
30. Suffer from overexertion: ACHE
31. Goes below the horizon: SETS. The latest sunrise is for the next few days.
32. Senior NCO: MSGT. (master sergeant)
33. "Oops!": "OH-OH!"
34. Place for an earring: LOBE
35. Grand-scale poem: EPIC
36. Pres. between FDR and DDE: HST. Franklin Delano Roosevelt / Harry S. Truman / Dwight David Eisenhower
39. Sandy shade: ECRU. Slight misdirection.
40. Flushed, as cheeks: ROSY
41. Down the road: LATER
46. Magician's syllables: ABRA. "Abracadabra!"
47. Pays tribute to: HONORS
48. "My schedule is wide open": "I'M FREE"
50. Works with flour: SIFTS
51. Cup for café or thé: TASSE. Le thé is French for tea. Tasse à café - coffee cup / Tasse à thé - teacup
52. Blowing one's top: IRATE
53. Lead or zinc: METAL
54. Blissful regions: EDENS
55. Cain's victim: ABEL
56. Commando garb: CAMO. (Camouflage)
57. Stumble: TRIP
58. Kiddie lit monster: OGRE
61. Mischief-maker: IMP
62. Modernist's prefix: NEO
Argyle