Carbon dust (4)

I believe the answer is:

soot

(Other definitions for soot that I've seen before include "Stuff from chimneys" , "Smut" , "Deposited carbon" , "Residue from burning" , "Carbon deposit from burning" .)

I've seen this clue in The Daily Mail.

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.