Author, fleet of foot (5)

I believe the answer is:

swift

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This clue might be a double definition.

'author' is the first definition.
(I've seen this before)

'fleet of foot' is the second definition.
'swift' can be an answer for 'fleet' (I've seen this before). I am not certain of the 'of foot' bit.

Can you help me to learn more?

(Other definitions for swift that I've seen before include "Fast - novelist" , "Jonathan ..., clergyman and satirist" , "Quick Irish satirist?" , "Fast; bird; writer" , "Swallow-like bird" .)

I've seen this clue in The Times.

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