Artist's workroom (6)
I believe the answer is:
studio
'artist's workroom' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for studio that I've seen before include "Where one might find artists" , "Workshop for 27 dn" , "RA's workroom" , "Workplace for the practice of art" , "Unpleasant vapour" .)