Antiquary's acquisition (5)
I believe the answer is:
relic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">antiquary's acquisition</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for relic that I've seen before include "A survival from the past" , "Outdated survival" , "Overshadow in importance" , "Long-surviving object" , "Trace" .)