Previous quick solution

Across: 6. Hexagon 7. Sushi 9. Tax 10. Sedentary

12. Countrified 15. Disregarded 17. Unscathed 19. Fat

21. Psalm 22. Fighter

Down: 1. Decay 2. Bay 3. Zone 4. Justified 5. Shorten

8. Terror 11. Correctly 13. Negate 14. Pianist 16. Gavel

18. Exit 20. Shy