Guzzler's sound (4)
I believe the answer is:
glug
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">guzzler's sound</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 glug that I've seen before include "Hollow gurgling sound" , "Noise of emptying bottle" , "Drink" .)