Quirk (12)
There are a few possibilities for this:
idiosyncrasy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">quirk</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 idiosyncrasy that I've seen before include "Foible" , "Quirk" , "Distinctive mannerism" , "Distinctive or peculiar characteristic" , "Peculiarity" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">quirk</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that quirk can be written as oddity)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for oddity that I've seen before include "Peculiarity" , "Something peculiar, person or event" , "Something unusual or curious" , "Something strange or eccentric" , "Curio, rarity" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">quirk</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 foible that I've seen before include "weakness" , "Minor eccentricity" , "Harmless peculiarity or mannerism" , "'Mannerism, idiosyncrasy (6)'" , "Harmless peculiarity in person's character" .)