Reference marks (5)
I believe the answer is:
obeli
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reference marks</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 obeli that I've seen before include "Cross references" , "Textual marks" , "signs of publishing" , "see below, we explain)" , "Signs referring to footnotes" .)