Blast-furnace fuel (4)
I believe the answer is:
coke
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">blast-furnace fuel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for coke that I've seen before include "something for heating" , "Fuel derived from coal" , "'Soft drink and hard drug, in short (4)'" , "Carbonised fuel residue" , "Fuel for heating" .)