Painter's garb (5)
I believe the answer is:
smock
'painter's garb' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for smock that I've seen before include "Artist's, peasant's, overall" , "Loose outer garment" , "Artist's loose overall" , "Loose dress or blouse" , "Loose overall or dress" .)