Cryptic crossword No 3,894

Across

1. Subject of falsehood with good name back (8)
2. Covers key parts where answers are hidden here? (8)
3. I should keep this man alive (2,4)
4. Back up test regularly via saves (4,2)
5. Singular pronoun I questionably adopted (6)
6. Island battleground has one half of Fiji captured by woman briefly (3,4)
7. Highlander initially lacking weapons and posing no threat (8)
8. One's had entertaining sex to reproduce (7)
9. Certain partner once allowed to take power (8)
10. Friend from Paris detained by former country for questioning (11)
11. Taking away grip on starboard side of vessel (11)
12. Narrow victory - a sign of rust? (6)

Down

1. Part of church left out in oversight (4)
2. One may save for this period of Fall? (5,3)
3. New alumni getting involved with fair (10)
4. Large bird in ring of fire? (8)
5. What US official may do while at home after strike in his field? (3,3)
6. Dividends split by these doctors saving four lives with oxygen (8)
7. Beer unfinished after unknown drug and spirit (4)
8. Japanese art on display in haiku baker's written up (6)
9. Excited, naked Tarzan: "Jane, I leader of baboon country!" (10)
10. Did set upon a ship and was ill (8)
11. Keepsake designed over in US (8)
12. It's found in wee Swiss town without limits on LSD (4,4)
13. Auditor's stained shirt possibly and is now late (4)
14. Perhaps Obi Wan's central character aboard ship with last of Sith (4)