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. 1a Woman's shirt (6)
  2. 4a Noisy confusion of voices (5)
  3. 7a Line of fibres twisted to form a thread (6)
  4. 8a Rectangular array of mathematical data set out in rows and columns (6)
  5. 9a Desert of central China (4)
  6. 10a Division of an academic year (8)
  7. 12a Lather aiding beard removal (7,4)
  8. 17a With the press and public excluded (2,6)
  9. 19a One of a similar pair (4)
  10. 20a Armed robber (6)
  11. 21a Narcotic drug (6)
  12. 22a Herb used in cooking as seasoning (5)
  13. 23a Dash joining words (6)
  14. 1d Baron Hardup's servant in Cinderella (7)
  15. 2d Egg-shaped wind instrument with finger holes (7)
  16. 3d Glancing blow (9)
  17. 4d Light-coloured marking on a horse's face (5)
  18. 5d Stiff cap worn by Roman Catholic clergy (7)
  19. 6d Extravagance (6)
  20. 11d Of birds that move seasonally (9)
  21. 13d Carriage for hire (7)
  22. 14d Largest living bird (7)
  23. 15d Wet (7)
  24. 16d Gallows (6)
  25. 18d Plant producing sweetcorn (5)