In a balanced manner (6)
I believe the answer is:
evenly
'in a balanced manner' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for evenly that I've seen before include "Calmly or equitably" , "on an equal footing" , "impartial manner" , "not getting ruffled" , "in a uniform way" .)