Previous solution

Across: 1. Declare 5. Hides 8. Well thought of 9. Era 10. Discourse 12. Bloats 13. Felons 15. Draws near 16. Air 18. Hair-splitting 20. Wagon 21. Tidings.

Down: 1. Dowse 2. Collaborating 3. Antidotes 4. Egoism 5. Hug 6. Deterioration 7. Suffers 11. Overrated 12. Bad show 14. Zealot 17. Rages

19. Sin.