Previous quick solution

Across: 6. Satanic 7. Depot 9. Aid 10. Perimeter

12. Antechamber 15. Belligerent 17. Fortunate 19. Hat

21. Octet 22. Barrier

Down: 1. Valid 2. Eat 3. Hire 4. Deferment 5. Foresee

8. Wither 11. Unclothed 13. Engine 14. Heroics 16. Wager

18. Trap 20. Arc