Gossips going to dance discuss business (4,4)
I believe the answer is:
talk shop
'discuss business' is the definition.
(I've seen this before)
'gossips going to dance' is the wordplay.
'gossips' becomes 'talks' (talk is a kind of gossip).
'going to' is a charade indicator (letters next to each other).
'dance' becomes 'hop' (hop is a kind of dance).
'talks'+'hop'='TALK SHOP'
(Other definitions for talk shop that I've seen before include "Discuss matters concerning one's work" , "Speak about one's work" , "dwell on work" , "Negotiations" , "Discuss business out of hours" .)