Leftover item (5)
(Other definitions for relic that I've seen before include "Revered religious remnant" , "Object from antiquity" , "item of historic interest" , "Object that has survived from the past" , "Object of reverence" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">leftover item</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 oddment that I've seen before include "An isolated article, something left over" , "Leftover item" , "a bit spare" , "Just a bit left" , "Left over item" .)