Ravage, destroy (9)
I believe the answer is:
devastate
I believe this is a double definition.
'ravage' is the first definition.
(I know that ravage can be written as devastate)
'destroy' is the second definition.
(I know that devastate is a more specific form of destroy)
(Other definitions for devastate that I've seen before include "Spoil" , "Lay waste or totally crush" , "Lay waste or overwhelm with grief" , "floor" , "Destroy" .)