Catch wrong part (4)
I believe the answer is:
trap
'catch' is the definition.
(trapping is a kind of catching)
'wrong part' is the wordplay.
'wrong' indicates an anagram.
'part' with letters rearranged gives 'TRAP'.
(Other definitions for trap that I've seen before include "Device to catch prey" , "Means of transport - sometimes sprung!" , "Light carriage - it's sometimes sprung!" , "two-wheeler" , "website?" .)