Did wrong (5)
I believe the answer is:
erred
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">did wrong</span>' is the definition.<br/ ><span class="explanation-format__explanation">(err can mean to sin or do wrong)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for erred that I've seen before include "Made mistake, was incorrect" , "Strayed from the straight and narrow" , "Made mistakes" , "Sinned" , "Gone astray!" .)