Oesophagus (6)
I believe the answer is:
gullet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">oesophagus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gullet that I've seen before include "Food passage from mouth to stomach" , "Food-passage from mouth to stomach" , "Passage between pharynx and stomach" , "Oesophagus" , "part of canal" .)