Hooter (3)
I believe the answer is:
owl
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hooter</span>' is the definition.<br/ ><span class="explanation-format__explanation">(owls hoot)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for owl that I've seen before include "Nocturnal bird of prey" , "Night person" , "One swoops" , "Harry Potter's Hedwig, for instance" , "You'll need hooter" .)