Where a brood is raised (4)
I believe the answer is:
nest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">where a brood is raised</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nest that I've seen before include "Make a home (birds)" , "Home for a flier" , "Snug retreat" , "Bird's retreat" , "Casually thrown" .)