Short erect tail (4)
I believe the answer is:
scut
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">short erect tail</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 scut that I've seen before include "Small tail as of rabbit" , "Cuts into a small tail" , "Deer's tail" , "Reindeer's tail" , "Short tail, such as rabbit's" .)