Related Clues:
- Guck
- Ugly expression when Bill's put off muck
- Unpleasant source of energy produces muck
- Filth, dirt
- Unpleasant substance
- Smut from regular girlie meet
- Disgusting deposit
- Disgustingly foul substance
- Skiing slang for gluey half-melted snow
- Not a mirage perhaps but ingrained dirt
- Dirt, for example, returns round the edge
- Smut produces scowl, putting Bill off
- Embedded dirt
- Cleaning lady's target
- Nasty buildup