Across 1. Gun 3. Conjunction 8. Euclid 9. Go for the jugular 10. Slope 11. Tacks 13. Flags 15. Pesters 16. Bananas 20. Marry 21. Naive 23. Arkle 24. Kangaroo 25. Allege 26. Yachtswoman 27. Yet
Down 1. Greasy spoon 2. Nicholas Nickleby 3. Chime 5. Croat 6. Intact 7. Nee 12. Sausage meat 13. Forum 14. Shady 18. Orinoco 19. Picnic 22. Exact 23. Allen key