Peculiar thing (6)
I believe the answer is:
oddity
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">peculiar thing</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 oddity that I've seen before include "Quirk" , "Peculiarity" , "Unusual thing" , "rare thing" , "Strange person/thing" .)