Remains out of the class (7)
I believe the answer is:
seminar
'class' is the definition.
(seminar is a kind of class)
'remains out of' is the wordplay.
'out of' indicates an anagram.
'remains' with letters rearranged gives 'SEMINAR'.
'the' acts as a link.
(Other definitions for seminar that I've seen before include "Teaching meeting, conference" , "Symposium" , "Student discussion group - remains (anag)" , "Group discussion of subject" , "Short intensive study course for marines" .)