Agreement to suspend fighting (5)
I believe the answer is:
truce
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">agreement to suspend fighting</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for truce that I've seen before include "Temporary cessation of hostilities" , "move towards permanent peace" , "Peace agreement" , "Agreed pause in fighting" , "Suspension of hostilities" .)