Colonist in Africa or a Greek island (6)
I believe the answer is:
rhodes
'greek island' is the definition.
(Rhodes is a Greek island)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for rhodes that I've seen before include "She and Rod have a Greek holiday here" , "Aegean island" , "Shored (anag) - Greek island" , "Largest island of the Dodecanese" , "Greek island - British-born South African statesman" .)