Room to work (6)
I believe the answer is:
office
I believe this is a double definition.
'room' is the first definition.
(I know that office is a type of room)
'work' is the second definition.
(office is a kind of work)
'to' acts as a link.
(Other definitions for office that I've seen before include "Firm" , "Subsidiary" , "Department" , "Job - place of work" , "Room for working" .)