Whinnied (7)
I believe the answer is:
neighed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">whinnied</span>' is the definition.<br/ ><span class="explanation-format__explanation">('neigh' can be a synonym of 'whinny')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for neighed that I've seen before include "Heeding (anag)" , "how Arab, for example, sounded" , "Cried" , "Whinnied" , "sounded "horsey"" .)