Switch setting
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">switch setting</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 off that I've seen before include "(Of food) no longer fresh" , "Away, or beginning to decay" , "Far from fresh" , "Complete (6,3) - See 14" , "Not working - started" .)