Marriott, for one (5)
I believe the answer is:
hotel
'marriott for one' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hotel that I've seen before include "Lodging house - code for "H"" , "Accommodating establishment" , "House for travellers" , "Where one may stay" , "Letter transmitted" .)