Painter Chagall (4)
I believe the answer is:
marc
'painter chagall' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for marc that I've seen before include "Brandy made from fruit-refuse" , "Brandy made from wine press residue" , "Strong liquor" , "Sort of brandy made from the remains of pressed grapes" , "Drink" .)