Gossip caused by jazz fan bringing in couple (8)
I believe the answer is:
chitchat
'gossip' is the definition.
('chitchat' can be a synonym of 'gossip')
'jazz fan bringing in couple' is the wordplay.
'jazz fan' becomes 'cat' (I've seen this before).
'bringing in' means one lot of letters goes inside another.
'couple' becomes 'hitch' (I've seen this before).
'cat' going around 'hitch' is 'CHITCHAT'.
'caused by' acts as a link.
(Other definitions for chitchat that I've seen before include "rabbit" , "Trivial conversation" , "Idle talk" , "Gossip" , "Light social conversation" .)