Meeting to which some people may come late? (6)
I believe the answer is:
seance
'meeting' is the definition.
(seance is a kind of meeting)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for seance that I've seen before include "Psychic gathering" , "Spiritualistic session" , "Meeting conducted by medium" , "Some may arrive late to this meeting" , "Meeting for communicating with spirits" .)