Tally mark (5)
I believe the answer is:
notch
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tally mark</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 notch that I've seen before include "Carved incision" , "Cleft" , "Secure" , "V-shaped nick" , "Gouge" .)