Meeting remains to be arranged (7)
I believe the answer is:
seminar
'meeting' is the definition.
(seminar is a kind of meeting)
'remains to be arranged' is the wordplay.
'to be arranged' indicates anagramming the letters.
'remains' anagrammed gives 'SEMINAR'.
(Other definitions for seminar that I've seen before include "Discussion meeting" , "Small discussion group for advanced students" , "Meeting for study" , "University course" , "Training conference" .)