Spear used in southern Africa (7)
I believe the answer is:
assegai
'spear used in southern africa' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for assegai that I've seen before include "African spear" , "Zulu fighting spear" , "A Zulu warrior's spear" , "Sea gas I convert to a Zulu spear" , "Spear used in southern Africa" .)