Where a brood is raised (4)
I believe the answer is:
nest
'where a brood is raised' is the definition.
(I've seen this in another clue)
This is all the clue.
(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" .)