Fashionable bird losing kilo (4)

I believe the answer is:

chic

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'fashionable' is the definition.
(chic means stylish or fashionable)

I don't understand how the remainder of the clue works.

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(Other definitions for chic that I've seen before include "Fashionably elegant" , "French elegance" , "Elegant and stylishly fashionable" , "Fashionably smart" , "Stylishness, elegance" .)

I've seen this clue in The Times.

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