Company practice to share accommodation (7)
I believe the answer is:
cohabit
'share accommodation' is the definition.
(I've seen this before)
'company practice' is the wordplay.
'company' becomes 'co' (abbreviation).
'practice' becomes 'habit' (habit is a kind of practice).
'co'+'habit'='COHABIT'
'to' acts as a link.
(Other definitions for cohabit that I've seen before include "shack up" , "What some items do" , "House-share" , "What to do with partner" , "become bedfellows" .)