Agreement to stop fighting (5)
I believe the answer is:
truce
'agreement to stop fighting' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for truce that I've seen before include "Temporary halt in hostilities" , "Suspension of hostilities" , "peace initiative" , "Cruet (anag.)" , "bit of peace" .)