Temporary dwelling housing an occupant (6)
I believe the answer is:
tenant
'occupant' is the definition.
(tenant is a kind of occupant)
'temporary dwelling housing an' is the wordplay.
'temporary dwelling' becomes 'tent'.
'housing' indicates putting letters inside.
'tent' going around 'an' is 'TENANT'.
(Other definitions for tenant that I've seen before include "holder" , "He pays rent for lodgings" , "Occupant of rented property" , "Lessee" , "One who pays rent" .)