Horse’s cry (6)
I believe the answer is:
whinny
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">horse's cry</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for whinny that I've seen before include "Horse's cry" , "High-pitched neigh" , "Joyful neigh of a horse" , "animal noise?" , "Gentle or joyful neigh" .)