Worthless matter (5)

I believe the answer is:

dross

'worthless matter' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for dross that I've seen before include "Rubbish, scum" , "Rubbish; impurities" , "Refuse - dregs" , "Impurity" , "Worthless matter" .)

I've seen this clue in The Independent and The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.