Building addition (9)
I believe the answer is:
extension
(Other definitions for extension that I've seen before include "Another phone" , "Annexe" , "Office phone, perhaps" , "Additional rooms" , "Added part" .)
I believe the answer is:
extension
(Other definitions for extension that I've seen before include "Another phone" , "Annexe" , "Office phone, perhaps" , "Additional rooms" , "Added part" .)