Across
- 3. City of churches (8)
- 6. Respiratory organs (5)
- 7. Tall Asiatic grass (6)
- 9. American coin (6)
- 10. Navigational instrument (7)
- 13. Feather used as a pen (5)
- 15. Tornado (7)
- 17. European currency (4)
- 18. Hogwarts house (10)
Down
- 1. Underwater vehicle (9)
- 2. Red-head (colloq) (5)
- 4. Whale babies (6)
- 5. Second planet from the sun (5)
- 8. Order of operations acronym (maths) (6)
- 10. Sauerkraut vegetable (7)
- 11. Sun clock (7)
- 12. Old-fashioned, retro (7)
- 13. Eccentric (6)
- 14. Female Mexican painter (5)
- 16. Mythological half-goat god (3)