Conflict, disagreement (7)
I believe the answer is:
dispute
I believe this clue is a double definition.
'conflict' is the first definition.
(I know that conflict can be written as dispute)
'disagreement' is the second definition.
(dispute is a kind of disagreement)
(Other definitions for dispute that I've seen before include "Quarrel over rights" , "Altercation" , "Altercate" , "conflict" , "Question or deny accuracy or validity" .)