One who is not present (8)
I believe the answer is:
absentee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one who is not present</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for absentee that I've seen before include "One who stays away" , "Bunker" , "one's failed to show up" , "One failing to attend" , "Someone not present" .)