A bag of loot? (4)
I believe the answer is:
sack
This clue is a double definition.
'a bag' is the first definition.
(both can mean a container)
'loot?' is the second definition.
(I've seen this in another clue)
'of' acts as a link.
(Other definitions for sack that I've seen before include "Fire (sl.)" , "Receptacle" , "Large hessian bag" , "destroy > 50s dress" , "Plundering by a mob" .)