Fussy, particular (7)
I believe the answer is:
faddish
This clue is a double definition.
'fussy' is the first definition.
(I've seen this before)
'particular' is the second definition.
(faddish or faddy can mean picky or particular)
(Other definitions for faddish that I've seen before include "Having personal whims" , "having peculiar tastes" , "Having many food likes and dislikes" , "Fussy" .)