Garment finally put on by painter (7)
I believe the answer is:
topcoat
'garment' is the definition.
(topcoat is a kind of garment)
'finally put on by painter' is the wordplay.
I cannot really understand how this works, but
'on' could be 'at' (I've seen this in other clues) and 'at' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for topcoat that I've seen before include "Final layer of paint" , "Ulster?" , "clothing" , "Heavy winter outer garment" , "It's worn on the outside in winter" .)