Issue concerning tenancy agreement (7)
I believe the answer is:
release
'issue' is the definition.
(issue can mean to release or give out)
'concerning tenancy agreement' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'tenancy agreement' becomes 'lease' (agreement for leasing a property).
're'+'lease'='RELEASE'
(Other definitions for release that I've seen before include "New film" , "Liberate" , "loose" , "Free - delivery" , "Free from confinement" .)