Transgressed (6)
I believe the answer is:
sinned
'transgressed' is the definition.
(sinning is a kind of transgressing)
This is all the clue.
(Other definitions for sinned that I've seen before include "Transgressed the moral law" , "Violated a moral law" , "Committed a serious offence" , "trespassed" , "Send in (anag.)" .)