Bird in a barn
I believe the answer is:
owl
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bird in a barn</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for owl that I've seen before include "Bird of the 18" , "Smuggle sheep" , "Creature" , "You'll need hooter" , "Fly low like a bird" .)