Hard black mineral used as fuel (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
coal
(Other definitions for coal that I've seen before include "Char" , "Carbonized vegetable matter" , "slack" , "Carbon fuel" , "Black mineral used for burning" .)
I believe the answer is:
coal
(Other definitions for coal that I've seen before include "Char" , "Carbonized vegetable matter" , "slack" , "Carbon fuel" , "Black mineral used for burning" .)