Extravagant — adores gin (anag) (9)

I believe the answer is:

grandiose

(Other definitions for grandiose that I've seen before include "Pretentiously imposing -- organised (anag)" , "Imposing and pompous, dressed in organdies" , "Ambitious" , "affected" , "Impressive in style" .)

I've seen this clue in The Guardian.

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