Chimney duct (4)

I believe the answer is:

flue

'chimney duct' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for flue that I've seen before include "Chimney channel" , "Vent pipe for smoke, etc" , "Passage for air" , "Chimney duct" , "Chimney-duct" .)

I've seen this clue in the King Feature Syndicate, The New York Times, the Sydney Morning Herald, The Mirror, the Newsday and the Penny Press.

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