Kitchen walls in residence primarily for balcony (7)
I believe the answer is:
gallery
'balcony' is the definition.
(gallery is a kind of balcony)
'kitchen walls in residence primarily' is the wordplay.
'kitchen' becomes 'galley' (galley is a kind of kitchen).
'walls in' means one lot of letters goes inside another (I've seen this in other clues).
'primarily' suggests taking the first letters.
The initial letter of 'residence' is 'r'.
'galley' going around 'r' is 'GALLERY'.
'for' is the link.
(Other definitions for gallery that I've seen before include "Display room" , "Golf spectators" , "Group of spectators" , "Highest level in theatre" , "Eg, the Tate" .)