Couple's seeking to provide accommodation for tenant (6)
I believe the answer is:
lessee
'tenant' is the definition.
(lessee is a kind of tenant)
'couple's seeking to provide accommodation for' is the wordplay.
'to provide accommodation for' indicates a hidden word (the solution is hidden or accommodated in the clue).
'LESSEE' is hidden within 'couples seeking'.
(Other definitions for lessee that I've seen before include "One renting a property" , "Contractor" , "The one taking out lease" , "Hirer of property" , "I have to deal with letter" .)