Rarely is student wearing revolutionary fashions (6)
I believe the answer is:
seldom
'rarely' is the definition.
('seldom' can be a synonym of 'rarely')
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for seldom that I've seen before include "Models (anag)" , "on rare occasions" , "Alluvium" , "Not often, infrequently" , "Once in a blue moon" .)