Smeltery waste (4)
'smeltery waste' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for slag that I've seen before include "Waste left over from coal-mining" , "Scum on metal - dissolute woman" , "a girl who puts out" , "Solid waste matter as from mine or smelter" , "dissolute man (more recently)" .)
'smeltery waste' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dross that I've seen before include "Impurity" , "Lees" , "Something of inferior quality" , "Slag!" , "Refuse - dregs" .)