Information being published concerning property contract (7)
I believe the answer is:
release
'information being published' is the definition.
(as in a press release)
'concerning property contract' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'property contract' becomes 'lease' (I've seen this before).
're'+'lease'='RELEASE'
(Other definitions for release that I've seen before include "Possibly film" , "Set free - publish" , "record" , "loose" , "Free - delivery" .)