Theme: No Reveal Monday - Four synonymous words.
20A. Fabric with a slight sheen: POLISHED COTTON
25A. Sophisticated-sounding hair treatment product: SUAVE SHAMPOO
46A. Coffee sweetener: REFINED SUGAR
55A. Plowed ground for crop-raising: CULTIVATED LAND
Argyle here. POLISHED, SUAVE, REFINED, CULTIVATED; so are we all.
Across:
1. Furtive summons: [PSST!]
5. Closes with force: SLAMS
10. See 13-Down: BABA. 13-Down. With 10-Across, "Open sesame" sayer: ALI
14. "It's __ you": "Your call": UP TO
15. Sultan's group: HAREM
16. Carrier to Tel Aviv: EL AL
17. React to a bad pun, perhaps: MOAN
18. BP merger partner: AMOCO
19. Longfellow's "The Bell of __": ATRI. "And this shall make, in every Christian clime, The Bell of Atri famous for all time."
23. Clay pigeon sport: SKEET
24. Tee shots into the hole: ACES
32. Slacks holder-upper: BELT
35. Baker's verb: MIX
36. Like old apples: MEALY
37. "Norma __": RAE
38. Fills with dismay: APPALLS
41. Word in a bride's bio: NÉE
44. Guernsey greeting: MOO!
45. Completely, after "from": A TO Z
50. Apple or pear: POME
51. "Spider-Man" actor Willem: DAFOE. Green Goblin.
60. Classic clown: BOZO
61. African country whose name is contained in the name of its southern neighbor: NIGER
62. Internet destination: SITE
63. It's a long story: EPIC
64. Porthole view: OCEAN
65. Flair: ELAN
66. Cubicle furnishing: DESK
67. Smells awful: REEKS
68. Once-sacred snakes: ASPs
Down:
1. Tire inflators: PUMPS
2. Frighten, as a horse: SPOOK
3. Like old bread: STALE
4. Most stylish: TONIEST
5. Former Iranian despot: SHAH
6. Unconvincing, excuse-wise: LAME
7. Ex-slugger and Fox Sports analyst, familiarly: A-ROD. (Alex Rodriguez)
8. Major tourist draws: MECCAs
9. Kiss: SMOOCH
10. "I have no clue": "BEATS ME"
11. Voice above tenor: ALTO
12. Rural building with big doors: BARN
21. Early Beatle Sutcliffe: STU
22. Bears and Grizzlies: TEAMS
26. Sound system part: AMP
27. Bigwig: VIP. (very important person)
28. Tests of knowledge: EXAMS
29. Huff and puff: PANT
30. Butterlike spread: OLEO
31. Command from a bailiff: "OYEZ!"
32. Uncle Remus rabbit's title: BR'ER
33. Nesting site, perhaps: EAVE. Nesting site for icicles.
34. Mariner Ericson: LEIF
38. Often ___: about half the time: AS NOT
39. Singer Rawls: LOU
40. Nautical journal: LOG
43. Long kiss: LIP LOCK
45. Shrinking Asian lake: ARAL SEA
47. Key with one sharp: E MINOR
48. Plot mechanism: DEVICE
49. Say further: ADD
52. Totally tanks: FAILS
53. Ready in the keg: ON TAP
54. Blissful regions: EDENS
55. Deal with adversity: COPE
56. Commando weapons: UZIs
57. "A Death in the Family" author James: AGEE
58. Tropical hardwood: TEAK
59. Sea eagles: ERNs
60. Crib or cot: BED
Argyle