Emit long loud cries (7)
I believe the answer is:
ululate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">emit long loud cries</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ululate that I've seen before include "Wail in grief" , "Express grief" , "Keen" , "Give a hoot" , "Howl, wail, screech" .)