Young king’s one for the people of Africa (5)
I believe the answer is:
tutsi
'the people of africa' is the definition.
(African ethnic group)
'young king's one' is the wordplay.
'young king's' becomes 'Tut's' (Tutankhamun).
'one' becomes 'i' (Roman numeral).
'tuts'+'i'='TUTSI'
'for' is the link.
(Other definitions for tutsi that I've seen before include "Rwandan Bantu" , "Member of a people living in Rwanda and Burundi" , "Person from Burundi" , "Tribespeople" , "tribesman" .)