"Canadian tuxedo" fabric (5)

I believe the answer is:

denim

(Other definitions for denim that I've seen before include "Durable material" , "Coarse durable twill-weave cotton fabric" , "Hard-wearing clothing material, twilled cotton" , "Cloth for jeans, etc" , "Hard-wearing cloth" .)

I've seen this clue in the LA Times.

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