Separated from others (8)
I believe the answer is:
isolated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">separated from others</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 isolated that I've seen before include "(Left) on one's own" , "'Detached, kept apart (8)'" , "Set apart, quarantined" , "Off the beaten track" , "Divorced" .)