Staggers; stones (5)
I believe the answer is:
rocks
I believe this is a double definition.
'staggers' is the first definition.
(both can mean to shock greatly)
'stones' is the second definition.
(I know this)
(Other definitions for rocks that I've seen before include "Regular moves to get child off" , "is brilliant" , "Causes shock to; diamonds" , "Large stones" , "cocaine?" .)