Complete
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1 9 12 13 17 20 22 11 2 18 3 23 4 10 16 14 8 21 5 6 15 7 19
  1. 1a Grating — abrasive (8)
  2. 5a High-ranking academic (abbr) (4)
  3. 9a Extremist (5)
  4. 10a Port at the mouth of the Seine (2,5)
  5. 11a Sofa (in Derbyshire?) (12)
  6. 13a Bill Haley's Shake, ___ and Roll! (6)
  7. 14a Colourless watery fluid of the blood and lymph (6)
  8. 17a Coastal city in southern California (5,7)
  9. 20a Stringed instrument player (7)
  10. 21a Inspection of the books (5)
  11. 22a Part (4)
  12. 23a Witty verbal ambiguities (8)
  13. 1d First king of the Israelites, according to the Old Testament (4)
  14. 2d Move by degrees in one direction only (7)
  15. 3d Region of Romania associated with Dracula (12)
  16. 4d Woman's top that fastens behind the neck, leaving back and arms uncovered (6)
  17. 6d Variety show (5)
  18. 7d If unread (anag) — it's related to Sigmund! (8)
  19. 8d Game where players shove discs into the scoring area, using long sticks (12)
  20. 12d Part of a rugby goal (8)
  21. 15d Thin pastry rolled round fruit and baked (7)
  22. 16d Military pageant (in Edinburgh?) (6)
  23. 18d In the nose (5)
  24. 19d Thin strip of bone used to stiffen eg a corset (4)