Rich man from South Africa confined, having been given a stretch? (9)
I believe the answer is:
elongated
'having been given a stretch?' is the definition.
(elongated means stretched out)
'rich man from south africa confined' is the wordplay.
'rich man from south africa' becomes 'Elon' (Elon Musk, South African billionaire).
'confined' becomes 'gated' (gating is a kind of confining).
'elon'+'gated'='ELONGATED'
(Other definitions for elongated that I've seen before include "Put on stretcher" , "going further" , "Go al dente to be lengthened or prolonged" , "Stretched" , "Dangle toe (anag)" .)