A dedicated follower of fashion (7)
I believe the answer is:
hipster
'a dedicated follower of fashion' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hipster that I've seen before include "Cool dude" , "Fashionable person" , "Bohemian" , "Dedicated follower of fashion" , "fitting below the waist" .)