Doctor remains for discussion group (7)
I believe the answer is:
seminar
'discussion group' is the definition.
(I've seen this before)
'doctor remains' is the wordplay.
'doctor' indicates an anagram.
'remains' anagrammed gives 'SEMINAR'.
'for' is the link.
(Other definitions for seminar that I've seen before include "Small discussion group for advanced students" , "Academic class" , "Student discussion group - remains (anag)" , "Training conference" , "Meeting for exchange of ideas" .)