Together, still (2,3,4,4)
I believe the answer is:
at the same time
I believe this clue is a double definition.
'together' is the first definition.
('at the same time' can be a synonym of 'together')
'still' is the second definition.
(thesaurus)
(Other definitions for at the same time that I've seen before include "Simultaneously - nevertheless" , "27 [AT ONE FELL SWOOP]" , "nonetheless" , "Coincidentally - still - however" , "together" .)