Winds up with part of a film on crime (5,2)
I believe the answer is:
reels in
'winds up with part' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'a film on crime' is the wordplay.
'a film' becomes 'reel' (reel is a kind of film).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'crime' becomes 'sin'.
'reel'+'sin'='REELS IN'
'of' acts as a link.
Can you help me to learn more?
(Another definition for reels in that I've seen is " Catches".)