It's South Africa in the sun for her (5)
I believe the answer is:
susan
'her' is the definition.
'it's south africa in the sun' is the wordplay.
'it's south africa' becomes 'SA' (abbreviation).
'in the' indicates putting letters inside.
'sa' placed inside 'sun' is 'SUSAN'.
'for' acts as a link.
(Other definitions for susan that I've seen before include "She's a black-eyed flower" , "Girl's name; lazy -" , "- - Sarandon, film actress" , "When lazy, she's a revolving tray on a dining table" , "Girl's name, meaning lily" .)