Related Clues:
- Volcanic scoria
- Gas in eastern district of Kent in short supply
- Some industrial waste
- Flammable gas; eat hen (anagram)
- Gas in fuel
- Beginning to erupt, chief of clan producing gas
- Industrial refuse
- Criticize, in British slang
- Petroleum refinery byproduct
- Metalworking waste
- Steel mill residue
- Petroleum refining byproduct
- Component of crude
- Mill debris
- Smelter byproduct