Historical memento (5)
I believe the answer is:
relic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">historical memento</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 relic that I've seen before include "Trace" , "precious object" , "Venerated memento" , "A survival from the past" , "Object of historic interest" .)