1. Whom you might say "hey" to every day → SIRI
5. Collect → AMASS
10. Indicator of an important email → STAR
14. One of many in a Swiss Army knife → TOOL
15. "Name your ___" → PRICE
16. Predator in a pod → ORCA
17. Salad topping that's actually from America and is rarely consumed in its namesake land → ITALIANDRESSING
20. Wheelchair access paths → RAMPS
21. Spanish "Listen up!" → OYE
22. "Shucks, you're too kind" → AWGEE
23. As a P.S. → ALSO
25. Sharp quality → EDGE
27. "Out of Africa" author actually named Karen Christentze von Blixen-Finecke → ISAKDINESEN
30. Knee parts, for short → ACLS
32. Wee winter workers → ELVES
33. It keeps the rain away → TARP
36. Shout at a Real Madrid game → GOL
37. Kosher barbecue option → BEEFRIB
39. Kenan's partner in comedy → KEL
40. Where Noah's Ark landed → ARARAT
42. Grant → GIVETO
44. Observance celebrating a decision actually made on July 2 — the date when John Adams predicted it would be celebrated → INDEPENDENCEDAY
48. "Scream" queen Campbell → NEVE
49. Jockey's handful → REINS
50. Humans : Homo :: bees : ___ → APIS
51. Frees (of) → RIDS
53. Includes online, in a way → CCS
54. Blueprint → PLAN
55. Some high-level H.S. classes → APS
56. Aids for minors buying liquor ... or a hint to 17-, 27- and 44-Across → FAKEIDS
59. ___ Faire → REN
61. Shrub that sounds regretful → RUE
62. Telethon contributions → PLEDGES
63. Ironman race, familiarly → TRI
64. Kind of oil in some edibles → CBD
65. "How ___ It End?" (Taylor Swift song) → DID
66. Lunch lady's hair holder → NET
67. Fancy handbag inits. → YSL