Bunghole plug (6)
I believe the answer is:
spigot
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">bunghole</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">plug</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(spigot is a kind of plug)</span><br/ ><br/ ></span>
(Other definitions for spigot that I've seen before include "Beer tap" , "Plug - an American tap" , "Small plug for cask" , "Peg to seal vent in cask" , "Wooden tap on a cask" .)