Baa (5)
I believe the answer is:
bleat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">baa</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bleat that I've seen before include "Sound like a sheep" , "Make complaint" , "Complain; sheep's cry" , "kid makes such a noise" , "Cry like a 16" .)