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)
Riaa = Rihanna - hnn
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
7. Before Christ, Jonah's insiders introduced first Hebrew God (6)
Adonai = AD + ona + i
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?
10. Flamboyant fly's wings around wish-granting body part (6)
Flashy = f + lash + y
11. Jovial monster rips out heart, surrounding first person (5)
Happy?
13. Clothing material shelled for Holy Roman emperor (4)
Otto = (C)otto(n)
14. Taiwanese company contracted Nigerian people (3)
Asu = Asus - s
15. Ancient piano instrumental finishes grand finale (3)
Old = piano instrumental + grand
16. Elizabeth places a wager close to fourth of July (5)
Betsy = Bets + y
17. Tried architect glances, moves foot to the west (5)
Speer = peers with s on the left.
18. Ethiopian opera featuring keyboard instrument (5)
Piano - Ethiopian opera
19. Postal director to turn head with extreme envy (3)
Uwe = turn + with + envy
20. Bold goer initially heads up inside rural centre (5)
Uhura - heads up inside 'ura'
21. Army unit with small four-wheeler and wizard (8)
Squadron = s + quad + ron
22. Standards organization backs network model (3)
OSI - ISO 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
25. Tea and baked goods for unsightly creatures (6)
Trolls = T + rolls
28. Don't start to hide behind blue-green toxin (7)
Cyanide = Cyan + (h)ide
30. Heroic poem briefly does make up chapter (7)
Episode = Epi(c) + anagram of does
31. Street goes below tree, never seen before (5)
First = Fir + st
32. Elizabeth initially next in line, loses turn (5)
Queen
36. Spice rings encircle half-hearted Ronald (7)
Oregano = O + regan + o
37. Programming pioneer's top three proverbs (3)
Ada
38. Deep blue crowdfunding site with no ego (6)
Indigo = Indiegogo - ego
40. Murderbot Ultra One ultimately scrapped (6)
Ultron = Ultr(a) + On(e)
41. Back balsam? Ah, a beautiful country (7)
Bahamas - balsam? Ah, a beautiful
43. No start for the trip of me and you (3)
Our = (T)our
44. On the premises, part spins it up (2 4)
In situ - spins it up
45. Legislative organs for storyteller (5)
Dumas?
47. Māori prophet's revolutionary aura (3)
Rua
49. Avenge odd appliance manufacturer (3)
AEG - Avenge
50. Vengeful seaman held in Allahabad (4)
Ahab - Allahabad
51. Cold sea fog from an empty hangar (4)
Haar - ha(ng)ar
54. Monagan brings up nineties host (6)
Nagano = Monagan backwards
57. Champion checker in the house (3)
Hou = house
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
70. Car with no sound (5)
Audio?