Rob or plunder (7)
I believe the answer is:
ransack
I believe this clue is a double definition.
'rob' is the first definition.
(thesaurus)
'plunder' is the second definition.
(synonyms)
(Other definitions for ransack that I've seen before include "Search (a place) thoroughly" , "Plunder or turn upside down in search" , "Examine thoroughly" , "Pillage, plunder" , "Loot or search thoroughly" .)