Gossip allowed back to get personal property (7)
I believe the answer is:
chattel
'personal property' is the definition.
(chattel is a kind of personal property)
'gossip allowed back' is the wordplay.
'gossip' becomes 'chat' ('chat' can be a synonym of 'gossip').
'allowed' becomes 'let' (I've seen this before).
'back' says the letters should be written backwards.
'let' back-to-front is 'tel'.
'chat'+'tel'='CHATTEL'
'to get' is the link.
(Other definitions for chattel that I've seen before include "something one owns" , "Item of non-freehold property" , "Item of personal property" , "Movable possession" , "Latchet (anag) - possession" .)