Partial answer
1. Far north Silicon Valley's research & development leaders surround Jessica (8)
Svalbard - Alba inside S.V.R & D
2. Pop star loses British-American distribution rights to music organization (4)
Sony?
4. Clapton song loses heart, gets inside club to be McCartney song (6)
Lalula = La(y)la + club
5. Yale professor Jenny with rights to Diablo north of Mali's capital (8)
Lindblom - Lind + blo + M
6. In retrospect, Korean Secretary-General is a Swedish actress (5)
Noomi - The end of Ban Ki-moon spelled backwards
8. Excess of vitamins lacking irate vim leads to state of trance (8)
Hypnosis - Hypervitaminosis without irate vim
9. Metric cruise around psychic medium is funny business (6)
Sitcom?
18. Ethiopian opera featuring keyboard instrument (5)
Piano - Ethiopian opera
22. Standards organization backs network model (3)
ISO - OSI backwards
23. Boating tool from metallic mineral, reportedly (3)
Oar - sounds like ore
24. 113 previously used underwater turtle heads (3)
Uut - used underwater turtle
28. Don't start to hide behind blue-green toxin (7)
Cyanide = Cyan + (h)ide
36. Spice rings encircle half-hearted Ronald (7)
Oregano = O + regan + o
38. Deep blue crowdfunding site with no ego (6)
Indigo = Indiegogo - ego
41. Back balsam? Ah, a beautiful country (7)
Bahamas - balsam? Ah, a beautiful
44. On the premises, part spins it up (2 4)
In situ - spins it up
47. Māori prophet's revolutionary aura (3)
Rua
50. Vengeful seaman held in Allahabad (4)
Ahab - Allahabad
51. Cold sea fog from an empty hangar (4)
Haar - ha(ng)ar
60. Motor club's credit rating (3)
AAA
61. Brush a pet in living room (5)
Groom - living room
62. Elevated bonus card game (3)
Uno - bonus
63. Gorilla secretly escapes (3)
Ape - escapes
64. Empty spaces for Roombas (7)
Vacuums - although vacua is usually the plural
69. Melted into Braxton (4)
Toni - anagram of into