Writer who was quick to ridicule? (5)

I believe the answer is:

swift

I'm a little stuck... Click here to teach me more about this clue!

'writer' is the definition.
(Jonathan Swift, 1667-1745)

I don't understand the rest of the clue.

(Other definitions for swift that I've seen before include "Happening quickly; author" , "Anglo-Irish satirist" , "Quick and rapid like a long-winged bird" , "Bird; happening quickly" , "Speedy - bird like a swallow" .)

I've seen this clue in The Globe and Mail.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.