Previous quick solution

Across: 1. Pass 3. Barracks 9. Amateur 10. Crypt 11. Take the floor 14. Sic 16. Alibi 17. For 18. Engine driver 21. Cacti 22. Unnerve 23. Religion 24. Heat

Down: 1. Practise 2. Snack 4. Air 5. Recalcitrant 6. Cry wolf 7. Site 8. Neutralising 12. Exile 13. Prurient 15. Cynical 19. Verse 20. Scar 22. UFO