Snitched about idiot (3)
I believe the answer is:
nit
'idiot' is the definition.
(nit can mean a stupid person)
'snitched about' is the wordplay.
'about' indicates a hidden word (the clue goes around or about the answer).
'NIT' can be found hidden inside 'snitched'.
(Other definitions for nit that I've seen before include "no egghead?" , "Egg of a louse (3)" , "small egg" , "Stupid person; egg" , "Parasite's egg made of tin" .)