Moral offence (3)
I believe the answer is:
sin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">moral offence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sin that I've seen before include "Breach of morality" , "Serious offence" , "Mortal offence" , "Breach of moral law" , "Serious transgression" .)