Party great for gossip (6)
I believe the answer is:
confab
'gossip' is the definition.
(synonyms)
'party great' is the wordplay.
'party' becomes 'con' (abbreviation for Conservative Party).
'great' becomes 'fab' (I've seen this in other clues).
'con'+'fab'='CONFAB'
'for' is the link.
(Other definitions for confab that I've seen before include "casual conversation" , "jaw" , "Talk informally" , "gossip" , "natter" .)