Rifle (7)
'rifle' is the definition.
(I know that carbine is a type of rifle)
This is the entire clue.
(Other definitions for carbine that I've seen before include "Light automatic rifle -- nice bra (anag)" , "A short light automatic rifle" .)
(Other definitions for ransack that I've seen before include "Harry" , "Pillage, plunder" , "Rob and despoil" , "Search (a place) thoroughly" , "Go through a place causing damage and stealing things" .)