Across

• 1. Special terms for arms? (6)
• 4. Trail ad in middle of program (6)
• 9. Choir puts out romance (9)
• 10. Heads of failed economic zone to produce felt cap (3)
• 11. Vile, disfigured, wicked. (4)
• 12. Greek character consumed by lesser Greek monster. (8)
• 14. Of X, commonly... (5)
• 16. Initial rifts forming (5)
• 20. Group and I attempt criminal behaviour (8)
• 21. Go back concerning man-eater! (4)
• 24. The times are changing? (3)
• 25. Choosers of the slain yak's liver stew. (9)
• 26. Relays over coats (6)
• 27. Priest's hollow "amen" after hoax. (6)

Down

• 1. Privileged information held by these cretins! (6)
• 2. Eyes for Euro-culinary essence (5)
• 3. First, do you try to clear out obligation? (4)
• 5. Copy hint badly... it's mesmerising! (8)
• 6. Losses of French achievements? (7)
• 7. Maize's kernel in drawback for enchanter. (6)
• 8. China's broken sequence. (5)
• 13. Disciple brewed vile beer (8)
• 15. Any fast train is make-believe (7)
• 17. Bastard is able to climb down. (6)
• 18. Fish for keyboard crusader (5)
• 19. Lecture was no less corrupted! (6)
• 22. General Motors holding wheel edge was big name in folklore? (5)
• 23. My hollow teeth are the stuff of legend. (4)