Catch different part (4)
I believe the answer is:
trap
'catch' is the definition.
(I know that trap is a kind of catch)
'different part' is the wordplay.
'different' indicates anagramming the letters (letters placed in a different order).
'part' is an anagram of 'TRAP'.
(Other definitions for trap that I've seen before include "Light carriage; ensnare" , "Ambush" , "Driver's obstacle" , "Baited device" , "Pitfall" .)