Reunion attendees (6)
I believe the answer is:
alumni
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reunion attendees</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 alumni that I've seen before include "Past pupils, Latin plural" , "Old boys and girls" , "Former (college) students" , "Past pupils of the old school" , "Past pupils, former students" .)