Nothing much around to plunder (4)
I believe the answer is:
loot
'to plunder' is the definition.
(synonyms)
'nothing much around' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'much' becomes 'lot' (I've seen this in other clues).
'around' means one lot of letters goes inside another.
'o' inserted within 'lot' is 'LOOT'.
(Other definitions for loot that I've seen before include "Swag, booty" , "Steal (goods); money" , "Plunder, pillage" , "Plunder - booty" , "Booty, spoils" .)