Thick end (4)
I believe the answer is:
butt
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thick end</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 butt that I've seen before include "Push with the head" , "Stub" , "Contralto" , "rear" , "Victim of ridicule" .)