Wordspiral

CLUES: 1. Perform a song 2. Precious metal 3. Darker part of twilight 4. Retain 5. Poke 6. Flat circular plate 7. Hotel cook 8. Be unsuccessful 9. Final 10. Extended journey 11. Bellow 12. Bring up 13. Peruse writing 14. Unable to hear 15. Securely fixed 16. Dairy product. Key word clue: Scottish town.