Conflict that was ended by The Sun (3,3,3)
I believe the answer is:
six day war
'conflict that was ended by the sun' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'conflict' is the wordplay.
I cannot quite understand how this works, but
'conflict' could be 'war' (war is a kind of conflict) and 'war' is found in the answer.
The remaining letters 'sixday' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
(Another definition for six day war that I've seen is " Fighting".)