Rifle through (7)
I believe the answer is:
ransack
'rifle through' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ransack that I've seen before include "Turn upside down in searching" , "Plunder; search ruthlessly" , "Search thoroughly - pillage" , "Rob and despoil" , "Go through a place causing damage and stealing things" .)