"Don't delete this" (4)
I believe the answer is:
stet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">don't delete this</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stet that I've seen before include "Direction in printing to cancel a correction or deletion" , "Print as is, don't alter spelling" , "Cancellation of correction" , "It may stand" , "As written, don't change" .)