Flamboyant; swish (6)

I believe the answer is:

dressy

(Other definitions for dressy that I've seen before include "(Of clothes) smart, formal" , "Sartorially elegant" , "Stylishly attired" , "Liking to wear fancy or formal clothes" , "Wearing stylish clothes, elegant (6)" .)

I've seen this clue in The Guardian.

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