Mean to move virtually south, all together (2,5)
I believe the answer is:
en masse
'all together' is the definition.
(I've seen this before)
'mean to move virtually south' is the wordplay.
'to move' indicates an anagram.
'virtually south' becomes 'sse' (South South East, direction which is almost south).
'mean' anagrammed gives 'enma'.
'enma'+'sse'='EN MASSE'
(Other definitions for en masse that I've seen before include "Many as one" , "All together as a group" , "In a group U altogether" , "All together (Fr.)" , "Sees man (anag.)" .)