Marauder (7)
'marauder' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for raider that I've seen before include "looter" , "One making incursion" , "Pillager, plunderer" , "Depredator" , "One who makes surprise attack, perhaps to steal" .)
'marauder' is the definition.
(thesaurus)
This is all the clue.
(Another definition for ravager that I've seen is " Person laying waste".)