Part of house contract put in order (7,4)
I believe the answer is:
drawing room
'part of house' is the definition.
(I've seen this before)
'contract put in order' is the wordplay.
'contract' becomes 'draw in'.
'put in order' becomes 'groom' (I can't justify this - if you can you should give a lot more credence to this answer).
'drawin'+'groom'='DRAWING-ROOM'
Can you help me to learn more?
(Other definitions for drawing room that I've seen before include "reception area" , "place of entertainment" , "Type of parlour" , "where one may be entertained" , "Part of art school" .)