Previous quick solution

Across: 1. Cavorts 5. Biffo 8. Self-assurance 9. See

10. Temporary 12. Dead-on 13. Attend 15. Brimstone

16. Tat 18. Stiff upper lip 20. Doyen 21. Red-eyed

Down: 1. Costs 2. Vulnerability 3. Reactions 4. Sesame

5. Bar 6. Fundamentally 7. One-eyed 11. On the mend

12. Debased 14. Cooper 17. Tepid 19. Fan