Rewarded with conflict (3)
I believe the answer is:
war
'conflict' is the definition.
(war is a kind of conflict)
'rewarded with' is the wordplay.
'with' indicates the answer is hidden within the clue.
'WAR' is hidden within 'rewarded'.
(Other definitions for war that I've seen before include "Hostile situation" , "Period of hostilities" , "State of armed struggle" , "Fight" , "Major conflict" .)