Film carried by South African star (5)
I believe the answer is:
spica
'star' is the definition.
(I know that Spica is a star)
'film carried by south african' is the wordplay.
'film' becomes 'pic' (short for picture).
'carried by' is an insertion indicator.
'south african' becomes 'SA' (abbreviation).
'pic' put inside 'sa' is 'SPICA'.
(Other definitions for spica that I've seen before include "Virgo's brightest star" , "Bright star" .)