Distinguishing feature (5)
I believe the answer is:
trait
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">distinguishing feature</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 trait that I've seen before include "Habit" , "Idiosyncrasy" , "A characteristic of straitened kind" , "Decorative band" , "Distinguishing feature" .)