Quick crossword

ACROSS

1. Impolite (4) 3. Unchanging (8) 9. Prison cell (7) 10. Throws (5) 11. Exchanged letters (12) 14. Delay (3) 16. Locomotive (5) 17. Be mistaken (3) 18. In various places (4,3,5) 21. Social blunder (5) 22. Agony (7) 23. Misconception (8) 24. Employed (4)

DOWN

1. Derision (8)

2. Giver (5)

4. Possess (3) 5. Instinctive behaviour (6,6) 6. Plain and functional (7) 7. Allocated job (4) 8. Notwithstanding (12) 12. Undecorated (5) 13. Halted (8) 15. Delighted (7)

19. All square (5)

20. Old (4)

22. Also (3)