Irishman caught at European spiritualists’ meeting (6)
I believe the answer is:
seance
'spiritualists' meeting' is the definition.
(meeting attempting to contact spirits)
'irishman caught at european' is the wordplay.
'irishman' becomes 'sean' (common Irish name).
'caught' becomes 'c' (cricket abbreviation).
'at' means one lot of letters go next to another.
'european' becomes 'E' (abbreviation e.g. EU).
'sean'+'c'+'e'='SEANCE'
(Other definitions for seance that I've seen before include "Spiritualist meeting to contact the dead" , "Meeting with spiritualist present" , "Meeting conducted by medium" , "Medium's session" , "Spiritualist meeting chaired by medium" .)