Complete
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7 9 16 17 20 22 1 12 13 2 18 3 10 23 8 11 21 4 14 19 5 15 6
  1. 1 a Plump (6)
  2. 4 a Flash jewellery (5)
  3. 7 a Students grouped according to ability (6)
  4. 8 a Sister's headgear (6)
  5. 9 a O Brother, Where Art ___ ? (2000 film with George Clooney) (4)
  6. 10 a Has an inkling (8)
  7. 12 a Noisy and disruptive ghost (11)
  8. 17 a Person fluent in many languages (8)
  9. 19 a Get rid of — tip (4)
  10. 20 a Requiring action quickly (6)
  11. 21 a Immoral — obscene (6)
  12. 22 a Duck much valued for the female's down feathers (5)
  13. 23 a Fatal (6)
  14. 1 d Tackle a backlog (5,2)
  15. 2 d Ill-matched (7)
  16. 3 d Shattering revelation (9)
  17. 4 d Colonel ___ , David Low's pompous army officer cartoon character (5)
  18. 5 d Effects (7)
  19. 6 d Like a fry-up? (6)
  20. 11 d View from a theatre seat, say (9)
  21. 13 d Bound (to do something) (7)
  22. 14 d Comprehensive — detailed (2-5)
  23. 15 d Cart for taking prisoners to the guillotine (7)
  24. 16 d Dapper (6)
  25. 18 d Someone on the way out ? (5)

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