Spiritualists' meeting (6)
I believe the answer is:
seance
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spiritualist's meeting</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 seance that I've seen before include "Psychic gathering" , "Meeting held by a medium" , "Spiritualist meeting, all hold hands" , "Meeting in which medium attempts to contact the dead" , "Meeting with spiritualist present" .)