Select group (5)
I believe the answer is:
elite
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">select group</span>' is the definition.<br/ ><span class="explanation-format__explanation">(an elite is a special group)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for elite that I've seen before include "Upper crust" , "12 letters = 1 inch (type)" , "Top group f" , "Identified as the best" , "Best, privileged, group" .)