"Wise" bird (3)
I believe the answer is:
owl
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wise bird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for owl that I've seen before include "Night person" , "Solemn person" , "Fly low like a bird" , "Hooting bird" , "Winged hooter" .)