Stump (4)
I believe the answer is:
stub
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stump</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stub that I've seen before include "Short piece left over" , "this pollution by smoker?" , "Counterfoil of cheque, receipt etc" , "Truncated remnant" , "Counterfoil of cheque or butt of cigarette" .)