Superior group; exclusive (5)
I believe the answer is:
elite
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">superior group</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">exclusive</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for elite that I've seen before include "Upper crust" , "Select part" , "Privileged or posh group" , "Superior group in society" , "First-class" .)