Relative in Africa, untraceable (4)
I believe the answer is:
aunt
'relative' is the definition.
(aunt is a kind of relative)
'in africa untraceable' is the wordplay.
'in' says the answer is hidden in the clue.
'AUNT' can be found hidden inside 'africa untraceable'.
(Other definitions for aunt that I've seen before include "Female relation" , "Blood relative" , "Tuna gone bad for the relative" , "Parent's sister" , "Uncle's wife" .)