1. Like water or SOS notes
2. Back from boating (2 words)
3. (Live) Music to whet your appetite?
4. Czech, Pole, or Serb
5. Superior ratings
6. Leaning type type
7. "Glamour" rival
8. Bearded barnyard beast
9. Future embryo
10. All dried up, as land (Anagram of SEER)
11. Sketch: Fr. (Anagram of HE A CUBE)
12. "Legalize It" subject
13. "Sure thing, skipper!"
16. Enzyme that regulates blood pressure (Anagram of NINER)
20. Letters on a brandy label
24. "Look at that!"
25. "Ultimate" degree
27. ___Paulo, Brazil
29. "Purrrfect!"
30. "Big Blue" of tech
31. Prefix with "classic" or "natal"
32. Camaro ___-Z (muscle car belonging to RICO)
34. Like 101 courses: Abbr.
38. Dance often done with top hat and cane
39. "Managed care" insurance org.
40. "Fat chance, lassie" (Opposite of 13-Down)
41. Suffix with sex or symbol
42. Sonny & Cher, e.g.
43. Bulgarian town (Sorry for this obscure entry - Anagram of PASS OVO)
46. What elephants work for
47. Man bun
48. "Beg pardon," in casual talk
50. "___ nous" (confidentially)
51. Show you're human
52. Censor for security reasons
56. Pianist Rubenstein, as he spelled his name in Poland
59. Totals the box-office take
60. "Crouching Tiger, Hidden Dragon" star
61. Glamberts, for example
62. Bone M.D.'s branch (Anagram of ROTH)
63. Grammatically correct reply to "Who's there?"
64. Charmin layer
65. "Tic-Tac-Dough" winning line