In a group coming from France (2,5)
I believe the answer is:
en masse
'in a group' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for en masse that I've seen before include "Many as one" , "All together - in France (2.5)" , "in concert" , "Sees man (anag.)" , "As a body (Fr.)" .)