Cryptic crossword No 4,044

Across

1. Small amount of relaxant injected into creature's chest (6)
2. Reassimilate reformed robbers accepting the beginning of atonement (8)
3. Goodness is not a factor in reformation of Rhodesia (2,4)
4. Liberal retired to produce part of an opera (8)
5. Delegation from Amcor gives dog to The Queen? (5)
6. Hammer gives Thor control (9)
7. Star in a movie? (7)
8. Anti-apartheid activist can be over the top in speech (4)
9. Open shoe letting in cold and dirt (7)
10. Agent revoked illegal CIA tap for each individual (3,6)
11. Enthusiasm for Centre for the Arts (5)
12. Lynch authors Eraserhead—it shows in this cinema? (8)
13. Quit to take up another contract (6)
14. Banshees—curiously, you no longer hear about them (3-5)
15. Not shifting snow, perhaps (6)
16. Opening cuts from Chinese Democracy played by Slash with backing from CIRCA in comeback performance for members of the Rock & Roll Hall of Fame (2,2)

Down

1. Set of shelves made by cook working in military installation (8)
2. In conclusion, ancient Sumerian city is weathering (8)
3. Time is considered in 30's population density, for example (9)
4. Distinguished specialist shown around excavation (7)
5. Terribly sober, dull people (5)
6. Loss of resistance from shock causes power failure (6)
7. Blind bachelor leads game of chance (6)
8. Ancient system of exercises making a come-back in Nagoya (4)
9. The least reputable artist he's reviewed (9)
10. Dreamer's catalogue of notions? (8)
11. Spiritual and political correctness constraining Latino dancing (8)
12. Carmine's son behind foiled crime? (7)
13. Go to bed with husband beset with gas from the bottom (4)
14. Conservatives delivered documents (6)
15. She moved away from seashore when swimming started up (5)
16. Special whip makes an impressive display (6)