Catch parent out (6)
I believe the answer is:
entrap
'catch' is the definition.
(to entrap is to catch with a trap)
'parent out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'parent' is an anagram of 'ENTRAP'.
(Other definitions for entrap that I've seen before include "Lure into wrongdoing in order to arrest" , "Ensnare, catch" , "Parent (anag)" , "Trick or beguile for parent" , "Take" .)