Together, as a whole (2,5)
I believe the answer is:
en masse
This clue is a double definition.
'together' is the first definition.
(French phrase meaning all together)
'as a whole' is the second definition.
(I've seen this in another clue)
(Other definitions for en masse that I've seen before include "As a body (Fr.)" , "Sees man (anag.)" , "All together - in France (2.5)" , "All together as a group" , "In force" .)