Peace pact (5)
I believe the answer is:
truce
'peace pact' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for truce that I've seen before include "Agreed ceasefire" , "Agreed pause in fighting" , "Cessation of hostilities to allow peace talks" , "Agreement to stop battle" , "Cease-fire, armistice" .)