Previous quick solution

Across: 1. Irrigate 7. Circa 8. Financier 9. Bag 10. Rank 11. Glance 13. Pronouncement 15. Gibber 16. Epic 18. Err 20. Narrators 21. Cause 22. Trampers

Down: 1. Infer 2. Run into 3. Guns 4. Trial-and-error 5. Probe 6. Largest 7. Cronies 12. Combine 13. Potency 14. Explode 15. Group 17. Cases 19. Harm