Exclude from a group (9)
I believe the answer is:
ostracise
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">exclude from a group</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ostracise that I've seen before include "Socrates and I are made to exclude from society" , "Exclude from a group or society" , "Banish from group" , "Cast out, send to Coventry" , "Shun, exclude" .)