The short end
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the short end</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 stub that I've seen before include "Short end" , "evidence of smoking, for example" , "Short bit of pencil, say" , "Truncated remnant" , "Broken-off end" .)