1. Package under a Christmas tree → GIFT
5. Old-fashioned butter maker → CHURN
10. Branded cotton swab → QTIP
14. Minnesota congresswoman Ilhan → OMAR
15. In on, as a trend → HIPTO
16. Big coffee containers → URNS
17. 1972 song by Elton John → TINYDANCER
19. Luxury auto whose logo is four overlapping rings → AUDI
20. In progress → ONGOING
21. :), ;), :D and others → SMILEYS
23. Formal "you," in Spanish → USTED
25. Comedian Wong → ALI
26. Projects, as a shadow → CASTS
29. 1985 song by John Cougar Mellencamp → SMALLTOWN
34. Comes to light → ARISES
36. X minus III, in old Rome → VII
37. Cosmonaut Gagarin → YURI
38. Held the reins → LED
39. Spot for a massage → SPA
41. R&B singer whose album "SOS" spent 100+ weeks in the Billboard top 10 → SZA
43. Element used in bronze → TIN
44. Sporting blade → EPEE
46. Draft pick? → ALE
48. Firstborn → ELDEST
50. 1987 song by Billy Joel and Ray Charles → BABYGRAND
53. Midsection measurement → GIRTH
54. Apt rhyme for "shriek" → EEK
55. Martial arts studios → DOJOS
57. Disheveled → UNKEMPT
61. Caribbean island with a liqueur named for it → CURACAO
65. Gently persuade → COAX
66. Capital of Arkansas ... or a description of 17-, 29- and 50-Across? → LITTLEROCK
68. In ___ land (daydreaming) → LALA
69. "I wish I could ___ that!" → UNSEE
70. A second helping, say → MORE
71. "Excuse me ..." → AHEM
72. Things shifted on a bicycle or in a car → GEARS
73. Winter coaster → SLED