Complete
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1 8 10 13 16 20 22 2 3 9 19 17 4 15 14 5 12 11 6 21 7 18
  1. 1a Controversial hip hop performer from the 1980s (7,6)
  2. 8a Gone by (3)
  3. 9a Agile crab (anag) — having to deal with a branch of mathematics (9)
  4. 10a Place of abysmal misery (8)
  5. 11a Opponent of something in particular (4)
  6. 13a Get lost! (4,2)
  7. 14a Prey (6)
  8. 16a Admits to wrongdoing or error (4)
  9. 17a Disposable object for holding drinks (5,3)
  10. 20a What was used pre-digital calculators for doing sums (5,4)
  11. 21a Lamb's mum (3)
  12. 22a In a generous way (13)
  13. 1d Grind teeth together (5)
  14. 2d Not attractive — no initial pong (anag) (2,3,8)
  15. 3d Mutton kebab (8)
  16. 4d Historic county on the west coast of Scotland (6)
  17. 5d Agnetha, Björn, Benny and Anni-Frid as a group (4)
  18. 6d Deep-fried Asian snack food with a fishy taste (5,8)
  19. 7d Correct (7)
  20. 12d Psychoanalyst's part of the unconscious mind that acts as a conscience (8)
  21. 13d Flower (7)
  22. 15d Tall, slender dog with a silky coat and large drooping ears (6)
  23. 18d Sustained righteousness (5)
  24. 19d Salty cheese (4)