Barbecue briquettes (5)
(Other definitions for charcoal that I've seen before include "It's made by burners for use in burners" , "Form of carbon for drawing" , "Fuel for barbecue cookers" , "Very dark gray color" , "Black carbon produced by burning wood" .)
'barbecue briquettes' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for coals that I've seen before include "Don't bring them to Newcastle" , "There's little point in bringing them to Newcastle" .)