Fascinating aura (8)
I believe the answer is:
mystique
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fascinating aura</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mystique that I've seen before include "Glamorous air" , "Enigmatic or compelling quality possessed by a person" , "Magical aura" , "Aura or secrecy or obscurity" , "something inexpressible" .)