Related Clues:

• Foundry by-product
• Smeltery junk
• Sleep interrupted by rook is rubbish
• Bronze Age jewelry material
• Very easy task collecting river junk
• Refuse when beginning to recycle to break bed down
• Glasslike stuff in concrete
• Cinderlike lava
• Waste beginning to deter Arctic explorer
• Stony waste matter (in a heap?)
• Waste produced in the smelting or refining of ore
• Right to interrupt sleep? Rubbish
• Byproduct used in building
• Waste coal
• Scum; rubbish