South American country may be shelled (6)
I believe the answer is:
brazil
This clue is a double definition.
'south american country' is the first definition.
(Brazil is an example)
'may be shelled' is the second definition.
(a brazil nut may be shelled)
(Other definitions for brazil that I've seen before include "Football World Cup holders" , "Fifth-largest country" , "Country of Rio de Janeiro and Sao Paulo" , "Nut (from South America?)" , "Amazon's country" .)