Babe's sound (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">babe'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 oink that I've seen before include "Porker's cry" , "Grunting noise" , "Swine sound" , "Sound from a sty" , "Noise a pig makes" .)