| DIRT | Any unclean substance such as mud or earth (4) |
| CLOGGED | Blocked with an accumulation of thick, wet matter, such as mud in the tread of your wellies! (7) |
| DAUB | Word, from Old French for "clothe in white" or "whitewash" , for clay, mud or plaster applied to wattles; a smear or splodge of something sticky; or, a crude or unskilled painting (4) |
| CLAY | Linked to English dialect for "sticky", word for a natural substance moulded and baked to make bricks, ceramics, cloam, pottery, tiles or other figuline articles; or, earth/mud generally (4) |
| SCAM | Fiddle starts to sound clear as mud (4) |
| MIRE | It's about as clear as mud |
| SALT | Crystalline substance such as fleur de sel, a pink Himalayan variety or that harvested from the shores of Maldon or the sea (4) |
| FLAT | Such a lead is less likely to sink into mud or silt (4,4) |
| PEAR | Such a lead is less likely to sink into mud or silt (4,4) |
| CAKE | A block of solid substance (such as soap or wax) (4) |
| SILT | Fine deposit of mud or clay, especially in a river or lake (4) |
| LAIR | Den or earth of a red fox (4) |
| CORE | Centre of an apple, pear, nuclear reactor, rope, cable or Earth (4) |
| CAVE | Large hole in rock or earth (4) |
| SOIL | One surrounded by the sun or earth (4) |
| BASE | Any chemical substance, such as ammonia, that reacts with an acid to form a salt and water (4) |
| CARB | Substance such as sugar or starch in foods |
| SMUT | Stain with a dirty substance, such as soot (4) |
| PIES | They can be mince, mud or mag (4) |
| LOAM | Rich, fertile mud or soil (4) |
