Facility falls under student accommodation contract (5)
I believe the answer is:
lease
'contract' is the definition.
(I know that lease is a more specific form of the action contract)
'facility falls under student accommodation' is the wordplay.
I cannot really see how this works, but
'facility' could be 'ease' (I've seen this before) and 'ease' is found in the answer.
'student' could be 'l' (learner, as in L-plates for learner drivers) and 'l' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lease that I've seen before include "Tenancy agreement" , "Ghost" , "Let for money" , "Letting contract" , "Contract to rent" .)