Previous solution

Across: 1. Reasons 5. Decor 8. Miscellaneous 9. Ass 10. Sacrilege 12. Doings 13. Knight 15. Smart Alec 16. Aim 18. Olive branches 20. Dined

21. Chevron.

Down: 1. Rumba 2. Assassination 3. Oversight 4. Select 5. Din 6. Choreographer 7. Respect 11. Innocence 12. Discord 14. Cleric 17. Mason 19. End.