Conciliatory gesture (5,6)
I believe the answer is:
olive branch
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conciliatory gesture</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 olive branch that I've seen before include "Emblem of peace" , "Symbol of peace" , "attempt at conciliation" , "One offered in peace" , "that will come to a 'sticky' end" .)