Some arguing over new rule (6)
I believe the answer is:
govern
'rule' is the definition.
(I know that rule can be written as govern)
'some arguing over new' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'GOVERN' is hidden within 'arguing over new'.
(Other definitions for govern that I've seen before include "Control and direct the affairs of" , "Exercise authority over a people" , "Rule or administer" , "Rule over or regulate" , "Rule with authority, perhaps a country" .)