Plundering coarse cloth (7)
I believe the answer is:
sacking
This clue might be a double definition.
'plundering' is the first definition.
(I know that plundering can be written as sacking)
'coarse cloth' is the second definition.
'sacking' can be an answer for 'cloth' (sacking is a kind of cloth). I am not sure about the 'coarse' bit.
Can you help me to learn more?
(Other definitions for sacking that I've seen before include "Firing; coarse material" , "P45" , "Terminating a person's employment" , "Firing the coarse cloth" , "Dismissal (from job)" .)