Related Clues:
- Mass of water droplets
- Mushroom ___ (atom bomb's wake)
- Masses of vapour floating in the atmosphere
- "Ice cream castles in the air," in a Mitchell song
- Make murky
- Symbols of impending trouble
- Fluffy floater
- Cumulus and stratus, say
- Cumulus and cirrus
- It's dark when raining
- Condensed air vapour
- It hides the sun
- Become gloomy, as stupid person going round university
- The Temptations' was numbered nine
- Become less transparent