Strayed (5)
I believe the answer is:
erred
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strayed</span>' is the definition.<br/ ><span class="explanation-format__explanation">('err' can be a synonym of 'stray')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for erred that I've seen before include "Made mistakes" , "Gone astray!" , "Went astray" , "slipped up" , "was inaccurate" .)