Sack for swag (4)
I believe the answer is:
loot
This clue is a double definition.
'sack' is the first definition.
(I've seen this before)
'swag' is the second definition.
(synonyms)
'for' is the link.
(Other definitions for loot that I've seen before include "Pillage; money" , "Steal (goods); money" , "rifle" , "familiar officer" , "Booty, spoils" .)