Steal money bag (6)
I believe the answer is:
I believe this is a triple definition!
'steal' is the first definition.
(I know that steal can be written as pocket)
'money' is the second definition.
(thesaurus)
'bag' is the third definition.
(I know that bag can be written as pocket)
(Other definitions for pocket that I've seen before include "Part of a billiard table" , "Pouch; steal" , "Take unlawfully" , "financial resources" , "Snooker table opening" .)