Lessee (6)
I believe the answer is:
tenant
'lessee' is the definition.
(I know that lessee can be written as tenant)
This is all the clue.
(Other definitions for tenant that I've seen before include "Renting occupant" , "One occupying rented property" , "Occupant of rented property" , "Someone who pays rent" , "Leaseholder" .)