Eyrie (4)
I believe the answer is:
nest
'eyrie' 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 "Cosy home like bird's" , "Rook's residence?" , "breeding-ground" , "Ingredient of Chinese soup" , "home for 22d [VIPERS]" .)