Home in a northern estate (4)
I believe the answer is:
nest
'home' is the definition.
(a bird's home)
'in a northern estate' is the wordplay.
'in' indicates a hidden word.
'NEST' is hidden within 'northern estate'.
(Other definitions for nest that I've seen before include "Structure for laying eggs" , "Structure to lay eggs" , "Bird's house" , "Something found in Chinese soup" , "Home to a bird" .)