Returned dug-up material (5)
I believe the answer is:
denim
'material' is the definition.
(type of fabric)
'returned dug-up' is the wordplay.
'returned' says the letters should be written backwards.
'dug up' becomes 'mined' (I've seen this in another clue).
'mined' written backwards gives 'DENIM'.
(Other definitions for denim that I've seen before include "Hard-wearing cotton fabric" , "Mined (anag)" , "Mined badly for a hard-wearing fabric" , "Hard-wearing clothing material, twilled cotton" , "Twill cloth" .)