Works by Van Gogh? Old Man captured in pieces (5)

I believe the answer is:
apart
'in pieces' is the definition.
(I've seen this before)
'works by van gogh? old man captured' is the wordplay.
I cannot quite see how this works, but
'works' could be 'art' (I've seen this before) and 'art' is present in the answer.
'man' could be 'p' (abbreviation for pawn, a chess piece or 'man') and 'p' is found within the answer.
A single letter 'a' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for apart that I've seen before include "Divided" , "in bits" , "out on a limb?" , "No longer living together" , "Unconnected" .)
