Report of behaviour in country house (5)
I believe the answer is:
manor
'country house' is the definition.
(I've seen this before)
'report of behaviour' is the wordplay.
'report of' shows a homophone (sound like) (how it'd sound if reported).
'behaviour' becomes 'manner' (manner is a kind of behaviour).
'manner' is a homophone of 'MANOR'.
'in' is the link.
(Other definitions for manor that I've seen before include "Nobleman's land" , "patch" , "Police district (slang)" , "Lord's estate" , "home territory" .)