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 Agatha Christie detective (7,6)
  2. 8a Chap (3)
  3. 9a Star that explodes, increasing greatly in brightness (9)
  4. 10a Brought together again (8)
  5. 11a Eagerly desirous (4)
  6. 13a Shepherds' sticks (6)
  7. 14a Pestilence (6)
  8. 16a Silence! (4)
  9. 17a Plato's mentor (8)
  10. 20a Mechanical failure — analysis (9)
  11. 21a Word for frightening! (3)
  12. 22a Shakespeare play (5,2,6)
  13. 1d Bart Simpson's father (5)
  14. 2d Lose impetus (3,3,2,5)
  15. 3d Change (address, job etc) (informal) (2,6)
  16. 4d Seen (6)
  17. 5d Cruel fairytale giant (4)
  18. 6d Swede, for example (4,9)
  19. 7d Tosh (7)
  20. 12d Woodwind instrument (8)
  21. 13d Live together (7)
  22. 15d Doze (3,3)
  23. 18d Glaswegians, say (5)
  24. 19d Very like (4)