Paying guest (6)
I believe the answer is:
lodger
'paying guest' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lodger that I've seen before include "Renter living with owner" , "He pays for room and board" , "Long-term paying guest" , "One paying for accommodation" , "One renting and living with the owner" .)