Many a Swift work (6)
I believe the answer is:
satire
'many a swift work' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for satire that I've seen before include "Mocking humour" , "Jonathan Swift's forte?" , "Use of irony in writing" , "sort of ironic humour" , "Sarcastic humour" .)