Compelling attractiveness (8)
I believe the answer is:
charisma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">compelling attractiveness</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 charisma that I've seen before include "magnetic quality" , "Compelling attractiveness" , "special personal quality" , "Person's magnetic charm" , "divine power" .)