Related Clues:
- Bottom of cooling tower is dark
- Good to take on threatening shape in darkness
- Dark brush changing hands
- Become tedious letter-writer, by the sound of it?
- Lose its excitement
- Grand tower in partial darkness
- Lose its appeal
- Weary? Get a blanket
- Air of despair
- Cloud of melancholy
- Apt rhyme for "doom"
- Cloth for coffin
- Tomb cloth
- Become less interesting; funereal cloth
- Light of dusk?