Commits a faux pas (4)
I believe the answer is:
errs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">commits a faux pas</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for errs that I've seen before include "Makes a mistake" , "Slips up" , "Goes wrong" , "Goes astray" , "Boobs" .)