Not taking sides (7)
I believe the answer is:
neutral
'not taking sides' is the definition.
(not taking sides in a dispute)
This is the entire clue.
(Other definitions for neutral that I've seen before include "Not partisan, unbiased" , "Indifferent; not in gear" , "trying to keep out of the war" , "Supporting neither side" , "Not taking sides in a war" .)