Related Clues:

• Potter's raw material
• Animation medium
• It's not needed in hydroponics
• 4-H Club concern
• Boxer Cassius
• Upper crust?
• ''The Great Compromiser''
• Farmer's earth
• Earthenware material
• Bedrock's covering, perhaps
• Make grimy
• Pottery stuff
• Singer Aiken
• Adobe material
• Befoul