Impressive stylishness (5)
I believe the answer is:
class
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">impressive stylishness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for class that I've seen before include "First-rate" , "pupils?" , "Kind" , "Elegance - form" , "School group" .)