Across
1. Pan 3. Femme fatale 8. Nebula 9. Iolanthe 10. Exams 11. Macaw 13. Steed 15. Niagara Falls 16. Calumet 20. Pooka 21. Means 23. Metre 24. Breathed 25. Cuckoo 26. Approximate 27. Nun
Down
1. Pandemonium 2. Nebraska 4. Moisten 5. Alarm 6. Antics 7. Exe 12. Whittle down 13. Scrap 14. Drama 17. Mistaken 18. Boredom 19. Make-up 22. Set-to 23. Mouse 24. Boa