Related Clues:

• Mill runoff
• Volcanic scoria
• Some industrial waste
• Industrial refuse
• Criticize, in British slang
• Steel mill residue
• Mill debris
• Smelter byproduct
• 44-Across by-product
• Smelter junk
• Bridge player's goal
• Blast furnace residue
• Foundry byproduct
• Blast furnace waste
• Smeltery byproduct