Discuss work (4,4)
I believe the answer is:
talk shop
'discuss work' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for talk shop that I've seen before include "Negotiations" , "like company bosses may do" , "Discuss work at a social event" , "Discuss matters concerning one's work" , "Speak about one's work" .)