Method picked up in country house (5)
I believe the answer is:
manor
'country house' is the definition.
(I've seen this before)
'method picked up' is the wordplay.
'method' becomes 'manner' (I've seen this in another clue).
'picked up' shows a homophone (sound like).
'manner' sounds like 'MANOR'.
'in' is the link.
(Other definitions for manor that I've seen before include "Big house - police district" , "house on estate" , "Grand country house" , "Mansion of a wealthy person" , "Landed estate" .)