Cryptic crossword No 3,900

Across

1. 13 butchered Nicholas II, for example (4)
2. Strange to be fully focused on the European Community? (9)
3. Blooms not applicable to unfolding crisis (8)
4. Ram raiders oddly lacking ram! (5)
5. Fish born of okapi's Cesarean section (6)
6. Once again show an interest in topped stone fruit (8)
7. Celebrity Traitors returns! (4)
8. Acrylic resin for each pair of glasses discussed (7)
9. Called for medical to be rearranged (7)
10. Charles' first wife's touched by Daisy's tragedy (8)
11. 13 23 in which fish may be observed with a different tail (8)
12. Twins George and Edward associated with iconic British motor (6)
13. Crop planted on Italian island for goat (9)
14. 13, 23 & 51 getting support (5)

Down

1. Soldiers took a meal around a time that's appointed (9)
2. Grandstanders charm old congressmen primarily in summits (8)
3. Unusually copious uniform replaced with runner's top showing 13 23 (7)
4. Republican overturning reveals how reward is found in drawer (8)
5. Part of Canada's transmission to the stars (2,5)
6. Looks to the audience in flight (6)
7. Hoarding was ignored to a certain extent (4)
8. Neither better nor worse than some of the qualified (5)
9. Scumbags getting comeuppance before mother finds stain (6)
10. 13 23 of first to resettle in Spanish city (5)
11. Surprise, surprise! Comeback yields benefits (4)
12. Listener heard quiet speaker (8)
13. Setter is stuck in crumbling mansion lacking sleep (8)
14. Conducts incredibly, one-armed, Schubert's overture (9)