Relaxing of tension (7)
I believe the answer is:
detente
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">relaxing of tension</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for detente that I've seen before include "Easing of hostility between nations" , "Easing of international tension" , "Easing of strained relations" , "The easing of tensions between nations" , "peace during hostilities" .)