Solid fuel (4)
'solid fuel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peat that I've seen before include "Some got energy from this" , "Fuel dug from bog" , "Bog material" , "Turf as in bogland" , "Fuel from marsh" .)
'solid fuel' is the definition.
(type of fuel made from coal)
This is all the clue.
(Other definitions for coke that I've seen before include "Fuel derived from coal" , "Substance left after gas and tar have been extracted from coal" , "A solid fuel; a drug (abbr.)" , "Nose candy" , "Fuel made from coal" .)
'solid fuel' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for coal that I've seen before include "Char" , "Carbonized vegetable matter" , "Black mineral used for burning" , "Mined fuel" , "Three domestic fuels" .)
(Other definitions for charcoal that I've seen before include "Black carbon produced by burning wood" , "Artist's black material" , "Standard" , "It's made by burners for use in burners" , "Form of carbon for drawing" .)