Issue over tenancy agreement (7)
I believe the answer is:
release
'issue' is the definition.
('release' can be a synonym of 'issue')
'over tenancy agreement' is the wordplay.
'over' becomes 're'.
'tenancy agreement' becomes 'lease' (I've seen this before).
're'+'lease'='RELEASE'
(Other definitions for release that I've seen before include "Let go" , "press announcement" , "Liberate" , "Free from confinement" , "Set free - publish" .)