Spiritualist meeting (6)
I believe the answer is:
seance
'spiritualist meeting' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for seance that I've seen before include "Dead-contacting session" , "Sitting with a medium" , "Session for spiritualists" , "Spiritualist session with medium in charge" , "Spiritualist meeting, all hold hands" .)