He trips over fashion follower (7)
I believe the answer is:
hipster
'follower' is the definition.
(I have seen 'Follower of fashion' mean 'hipster' so perhaps 'follower' could also mean 'hipster')
'he trips over fashion' is the wordplay.
'over' says to put letters next to each other (in a down clue, some letters go over others).
'fashion' indicates an anagram.
'he' put after 'trips' is 'tripshe'.
'tripshe' is an anagram of 'HIPSTER'.
(Other definitions for hipster that I've seen before include "Bohemian" , "Fashionable person" , "Cool dude" , "Follower of the latest fashions" , "Trendy person" .)