Mate with work in front of garrulous gossip (7)
I believe the answer is:
chinwag
'gossip' is the definition.
(I've seen this before)
'mate with work in front of garrulous' is the wordplay.
'mate' becomes 'china' (cockney rhyming slang, mate is china plate).
'with' means one lot of letters goes inside another.
'work' becomes 'w' (physics abbreviation).
'in front of' says to take the initial letters.
The first letter of 'garrulous' is 'g'.
'china' going around 'w' is 'chinwa'.
'chinwa'+'g'='CHINWAG'
(Other definitions for chinwag that I've seen before include "Can Whig have an informal chat?" , "Conversation (slang)" , "Chat (colloq.)" , "Talk (sl.)" , "Gossip" .)