Dug out returned material (5)
I believe the answer is:
denim
'material' is the definition.
(type of fabric)
'dug out returned' is the wordplay.
'dug out' becomes 'mined' (I've seen this before).
'returned' says the letters should be written in reverse.
'mined' written backwards gives 'DENIM'.
(Other definitions for denim that I've seen before include "Mined (anag)" , "Fabric used for jeans" , "Hard-wearing material seen in jeans" , "Hard-wearing clothing material, twilled cotton" , "Tough cotton fabric" .)