Hee-hawed (6)
I believe the answer is:
brayed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hee-hawed</span>' is the definition.<br/ ><span class="explanation-format__explanation">('bray' can be a synonym of 'hee-haw')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for brayed that I've seen before include "Made noise like donkey" , "Made sound like donkey" , "Hee-hawed" , "Laughed like a donkey" , "made a beastly noise" .)