A bit of conviviality entailed gossip (5)
I believe the answer is:
yenta
'gossip' is the definition.
(yenta is a kind of gossip)
'a bit of conviviality entailed' is the wordplay.
'a bit of' indicates the answer is hidden within the clue (I've seen 'a bit' mean this (the answer is formed by a bit of the clue)).
'YENTA' is hidden in the letters of 'conviviality entailed'.
(Other definitions for yenta that I've seen before include "Gossip in New York" , "American busybody" , "gossip abroad" .)