Theme: Oh Tannenbaum - Got your tree yet? The theme entries are items that may be placed on said tree.
17A. Hollywood : TINSELTOWN
24A. Outdoor seating option : C A N E CHAIR. Candy canes.
34A. Festive centerpiece adorned with the starts 17-, 24-, 49- and 57-Across : CHRISTMAS TREE
49A. All the details, casually : BALL OF WAX. Glass ornaments.
57A. Venezuelan natural wonder : ANGEL FALLS. To top it all off.
Argyle here. A nice seasonal offering today. An occasional nut to crunch on but on the whole, a sweet start to the week. Some longish verticals to give it some added sparkle.
Across:
1. Mascara recipient : LASH
5. Lie in store for : AWAIT
10. Naval jail : BRIG
14. __ rug : AREA
15. Swiss capital, to the Swiss : BERNE. The French spelling. Official languages are German (63.7 %)(Bern), French (20.4 %), Italian (6.5 %)(Berna), and Romansh (0.5 %)(Berna). Also, Bernese German: Bärn. I hope I've covered all the nits.
16. One and only : LONE
19. "My great hope __ laugh as much as I cry": Angelou : IS TO. "to get my work done and try to love somebody and have the courage to accept the love in return."
20. Impressive property : ESTATE
21. Dugout leader : MANAGER
23. Mattress make : SERTA
26. Airport screening org. : TSA. (Transportation Security Administration)
27. WC : LOO. British (water closet (toilet))
29. Italian three : TRE
30. "Stop-__": UGK hit : N-GO UGK = UnderGround Kings. Clip, if you care to listen.
31. Classic theater name : BIJOU. A recent entry.
33. Ignore socially : SNUB
39. Big cat's cry : ROAR
40. Ballet bends : PLIÉs
41. Flightless Aussie bird : EMU
42. Pickle's place : JAR. Cool alliteration.
45. Computer application file extension : .EXE
46. CBS-owned cable movie sta. : SHO. (SHOWTIME)
52. Group of eight : OCTAD. I have to wait on the ending.
54. Not taking sides : NEUTRAL
55. Pointed abode : A-FRAME
56. Gets hitched : WEDS
59. __ above the rest : A CUT
60. Just right : IDEAL
61. Flower-loving buzzers : BEEs
62. Peeps from pups : YIPS
63. Pub game : DARTS
64. Miss in Mex. : SRTA. (señorita)
Down:
1. Most current news, with "the" : LATEST
2. Crops up : ARISES
3. Nissan compact : SENTRA. Production - Subcompact (1982–2000) Compact (2000–present).
4. Assails : HAS AT
5. Blessed with skills : ABLE
6. __ behind the ears : WET. A reference to new borns, hence those that are inexperienced.
7. Yummy smell : AROMA
8. Needing, with "of" : IN WANT
9. Sawbuck, to a Brit : TENNER. A doable guess.
10. HMS Bounty's ill-fated captain : BLIGH
11. '80s-'90s wisecracking TV mom : ROSEANNE
12. Cloak-and-dagger doings : INTRIGUE
13. Former Prizm maker : GEO. Production was 1988–2002: Geo Prizm (1990–1997), Chevrolet Prizm (1998–2002)
18. And others, in bibliographies : ET ALII
22. Unhittable serve : ACE
24. Crotchety oldster : COOT
25. Stick up : ROB
28. Drinks in the a.m. : OJ's
31. "I need a sweater!" : [BRR!]
32. Baseball arbiter : UMP
33. Yearbook gp. : SR's (seniors)
34. Five-time Olympic gold winner Nadia : COMANECI
35. Called to account : HAULED UP
36. "Jeopardy!" host Trebek : ALEX
37. Common dinner hour : SIX. You agree?
38. Make really mad : TEE OFF
39. Civil War soldier : REB
42. Write quickly : JOT
43. Frightened : AFRAID
44. Central African country about the size of Massachusetts : RWANDA
46. Less fresh : STALER
47. "To be, or not to be" speaker : HAMLET
48. Ukrainian port : ODESSA. On the Black Sea.
50. Thirsts (for) : LUSTS
51. Alleged Soviet spy Hiss : ALGER. Accused of being a Soviet spy in 1948 and convicted of perjury in connection with this charge in 1950.
53. "Deadliest Catch" boatful : CRABS. Crab fishing on Alaska's Bering Sea on the Discovery Channel.
55. "__ fair in love ..." : ALL'S
56. Technique : WAY
58. "Dig in!" : "EAT!"
Argyle