Almost transfix a native of Africa (6)
I believe the answer is:
impala
'native of africa' is the definition.
(type of antelope native to Africa)
'almost transfix a' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'transfix' becomes 'impale' (synonyms).
'impale' with its final letter taken off is 'impal'.
'impal'+'a'='IMPALA'
(Other definitions for impala that I've seen before include "'African antelope, takes great leaps (6)'" , "One regularly browsing" , "Breed of antelope" , "African resident" , "horned beast" .)