Trousers too long for fashionable person? (7)

I believe the answer is:

hipster

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'fashionable person?' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for hipster that I've seen before include "Bohemian" , "kind of pants" , "Cool dude" , "fitting below the waist" , "Trendsetter" .)

I've seen this clue in The Telegraph.

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