It may fly somewhat furiously (3)

I believe the answer is:

fur

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'it may fly' is the definition.
(reference to the phrase 'make the fur fly')

I don't understand the rest of the clue.

(Other definitions for fur that I've seen before include "Eg, chinchilla" , "I may fly" , "Eg, sable or ermine" , "Coating formed on sick person's tongue (3)" , "Coating in kettle" .)

I've seen this clue in the Evening Standard.

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