Old country house table in good condition (9)
I believe the answer is:
chartwell
'old country house' is the definition.
(Chartwell is a stately home)
'table in good condition' is the wordplay.
'table' becomes 'chart' (I've seen this before).
'in good condition' becomes 'well' (I've seen this before).
'chart'+'well'='CHARTWELL'
(Other definitions for chartwell that I've seen before include "Churchill's place?" , "Winston Churchill's Kent home" .)