Previous solution

Across: 6. Wailing 7. Serve 9. Ivy 10. Ebullient 12. Duplicitous 15. Holding sway 17. Recurring 19. Dew 21. Cubed 22. Rejoice.

Down: 1. Mauve 2. Old 3. Knob 4. Leviathan 5. Even out 8. Clocks 11. Quadruped 13. Loners 14. Doleful 16. Bench 18. Need 20. Box.