Meeting of spiritualists (6)
I believe the answer is:
seance
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">meeting of spiritualists</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 seance that I've seen before include "Medium experience?" , "Spiritualist meeting chaired by medium" , "Sitting - can see (anag)" , "Spiritualists meeting with medium" , "Sitting, session" .)