Related Clues:

• Smelter's waste
• It's hot stuff
• Combustion residue
• Tough wood
• Kilauea output
• Hawaiian bubbly?
• ___ Wednesday
• Rock on the roll?
• Smelting byproduct
• A tray may hold it
• Fire remains
• Type of tray
• Burier of Pompeii
• Etna effluent
• Smeltery refuse