Spiritualist's meeting (6)
I believe the answer is:
seance
'spiritualist's meeting' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)