Study group remains disrupted (7)
I believe the answer is:
seminar
'study group' is the definition.
(I've seen this before)
'remains disrupted' is the wordplay.
'disrupted' indicates anagramming the letters.
'remains' anagrammed gives 'SEMINAR'.
(Other definitions for seminar that I've seen before include "Training meeting" , "Discussion meeting" , "workshop" , "Short intensive study course for marines" , "Meeting for exchange of ideas" .)