South Seas islands
I believe the answer is:
oceania
'south seas islands' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oceania that I've seen before include "Polynesia, Micronesia and Melanesia" , "Islands of the south Pacific -- a neo-CIA (anag)" , "part of the Pacific" , "The Pacific islands taken together" , "Pacific island area" .)