Release? Not really, but a landlord might do so (5)
I believe the answer is:
relet
'release?' is the definition.
Both the answer and definition are verbs in their base form.
Perhaps you can see an association between them that I don't see?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for relet that I've seen before include "Allowed use of premises for payment - again" , "have another tenant" , "Rent out (room) again" , "Lease the property again" , "offer accommodation again?" .)