High-IQ society (5)
I believe the answer is:
mensa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">high-iq society</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 mensa that I've seen before include "IQ-based organisation" , "Stars" , "Organisation for the clever" , "High IQ society" , "High-IQ organisation" .)