Fleet Street embracing Dutch, but not English (5)

I believe the answer is:

swift

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'fleet' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

(Other definitions for swift that I've seen before include "wit?" , "Fast; bird; writer" , "Swallow-like bird" , "Jonathan . . . . . wrote 'Gulliver's Travels'" , "like a peregrine falcon?" .)

I've seen this clue in The Times.

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