Counterfoil (4)
I believe the answer is:
stub
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">counterfoil</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stub that I've seen before include "Objections after picking up" , "Strike against hard object - one's toe, perhaps" , "Pencil or cigarette end" , "Short bit of pencil, say" , "30 [FAG END]" .)