Material taken from the ground up (5)

I believe the answer is:

denim

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'material' is the definition.
(type of fabric)

I cannot understand how the rest of the clue works.

(Other definitions for denim that I've seen before include "dark blue material" , "Hard-wearing material seen in jeans" , "Cloth for jeans, etc" , "Hard-wearing blue fabric" , "maker of jeans" .)

I've seen this clue in The Sun.

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