Plunder, rob (7)
I believe the answer is:
despoil
I believe this is a double definition.
'plunder' is the first definition.
(I know that plunder can be written as despoil)
'rob' is the second definition.
(I've seen this before)
(Other definitions for despoil that I've seen before include "Plunder - I sloped (anag)" , "Plunder, devastate" , "Plunder (a place)" , "Ravage" , "Plunder - piled so (anag)" .)