Cryptic crossword No 4,052

Across

1. New Twitch currency introduced is unstable (8)
2. Soviet line sent out for display (10)
3. Half of French on ecstasy without restrictions (4)
4. Leader leaving tie - northerner? (4)
5. Black gemstone - sell back for figs (10)
6. Arabic man is amazing at first, boring in ejaculation (8)
7. Tobacco ok educationally, partly heated up (6)
8. Angrily I built sluice pit like water companies should be? (6,9)
9. Sense of unhappiness when detectives' group is sat the other way around inside (15)
10. Sean, cycling, grabs gold - feeling sick (6)
11. Senior in government - best incriminate somehow! (7,8)
12. What the government calls when conservative former Queen breaches boundary after push? (5,10)

Down

1. Drunk, I climb ice - stupid! (9)
2. Surpass former partner on instrument but left out, love gone (5)
3. Record one-second poem for mental health break (7)
4. Report: muscles attractive (7)
5. Pass former Greek island (7)
6. One crop all over Virginia causing greed (7)
7. Precise weapon raised cut borders (5)
8. Optics in emerging partially reflecting lenses (7)
9. Row heard leading to hit in the head (5)
10. Demanding purpose constrains sibling (9)
11. Shit remote university for a talent spotter (5)
12. Uncertainty after French girl losing breadth got fatter (6,3)
13. Deer run from racecar I bought (7)
14. Lauren, ten, breaks into AI algorithm (6,3)