Complete
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6 7 10 13 17 21 23 1 14 2 12 11 3 16 22 15 4 8 20 18 5 19 9
  1. 1a Penal institution where inmates are forced to work (6,4)
  2. 7a Fall asleep (4,3)
  3. 8a Encrypted (5)
  4. 10a A smaller amount (4)
  5. 11a Type of tooth (8)
  6. 13a Jewish salutation (6)
  7. 15a Graduate's qualification (6)
  8. 17a Surround (8)
  9. 18a Loose scrum — handle roughly (4)
  10. 21a Chinese secret society (5)
  11. 22a Benny ___ , "King of Swing" (7)
  12. 23a Remember and take into account (4,2,4)
  13. 1d Physical appearance (5)
  14. 2d Floating marker (4)
  15. 3d Spread out (6)
  16. 4d Salad vegetable (8)
  17. 5d Busybody (7)
  18. 6d Young person (10)
  19. 9d High-quality tea grown in northern India (10)
  20. 12d Passageway (8)
  21. 14d Collection of documents (7)
  22. 16d Connect to power supply (4,2)
  23. 19d Carrying a weapon (5)
  24. 20d Cartoon bear (4)