Across: 1. Pip 3. Ride shotgun 8. Expose 9. Notional 10. Cause havoc 11. Relic 13. Piles 15. Peckish 16. Example 20. Agony 21. Divot 24. Carnival 25. Cuckoo 26. Break it to me gently 27. Doh
Down: 1. Preoccupied 2. Pop music 3. Rosie 4. Ennoble 5. Osier 7. Nil 12. Cheesecloth 13. Pasta 14. Sixty 17. Provoked 18. Moonlit 19. Averse 22. Think 23. House 24. Cub