Editor’s note (4)
I believe the answer is:
stet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">editor's note</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 stet that I've seen before include "'In printing, cancel a correction and leave it as it was (4)'" , "Let it stand - printer's mark" , "cancel amendment" , "Instruction to keep" , "Leave in, as text" .)