Chatter in workplace after introduction of bonuses (4)
I believe the answer is:
blab
'chatter' is the definition.
(thesaurus)
'workplace after introduction of bonuses' is the wordplay.
'workplace' becomes 'lab' (lab is a kind of workplace).
'after' means one lot of letters go next to another.
'introduction of' suggests taking the first letters.
The initial letter of 'bonuses' is 'b'.
'lab' after 'b' is 'BLAB'.
'in' acts as a link.
(Other definitions for blab that I've seen before include "Divulge secret information" , "Reveal indiscreetly" , "Talk indiscreetly" , "Let slip" , "24 ac secrets in talk" .)