1. Unable to doze (9)
6. Forbidden (5)
9. Irreligious (7)
10. Small glass toy balls (7)
11. Honors (7)
12. Coach (7)
13. Vortex (9)
15. Greek last letter (5)
16. Requires (5)
19. Revolutionary (9)
22. Thence (7)
23. An unintentional but embarrassing blunder (7)
25. Not inside (7)
26. Ancient Greek or Roman warship (7)
27. Rip up (5)
28. Make understand (9)
Down
1. Pig feed (5)
2. Choose and follow ideas and policies (7)
3. Affirm (7)
4. S S S S (5)
5. Occasionally (9)
6. Twister (7)
7. A state of equilibrium (7)
8. Perceptive (9)
13. Military supplies (9)
14. Make stronger (9)
17. Voter (7)
18. A hormone affecting physical development (7)
20. Taking a break (7)
21. Implore (7)
23. Highway inn (5)
24. Song of joy (5)