South Africa has quiet resort (3)
I believe the answer is:
spa
'resort' is the definition.
(spa is a kind of resort)
'south africa has quiet' is the wordplay.
'south africa' becomes 'SA' (abbreviation).
'has' is an insertion indicator.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'sa' placed around 'p' is 'SPA'.
(Other definitions for spa that I've seen before include "Health resort near a spring" , "Heated bath" , "Health and beauty treatment establishment" , "Hydromassage facility" , "A curative mineral spring, or place with one" .)