Subtraction sign (5)
I believe the answer is:
minus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">subtraction sign</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 minus that I've seen before include "Lacking; negative" , "'Take away' sign" , "(Of temperature) below zero" , "Deprived of" , "Lacking; below zero" .)