Put back material that's extracted from the earth (5)
I believe the answer is:
mined
'extracted from the earth' is the definition.
I can't judge whether this definition defines the answer.
'put back material' is the wordplay.
'put back' says the letters should be written in reverse.
'material' becomes 'denim' (type of fabric).
'denim' backwards is 'MINED'.
'that's' is the link.
Can you help me to learn more?
(Other definitions for mined that I've seen before include "Extracted minerals from the earth" , "Dug for minerals, say coal" , "Sought diamonds?" , "proceeded secretly" , "Excavated as for coal or diamonds" .)