Horny African from eastern region (5)
I believe the answer is:
eland
'horny african' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'eastern region' is the wordplay.
'eastern' becomes 'e'.
'region' becomes 'land' (land is a kind of region).
'e'+'land'='ELAND'
'from' is the link.
Can you help me to learn more?
(Other definitions for eland that I've seen before include "South African antelope" , "African beast" , "Spiral-horn antelope" , "One browses in the African plain" , "game animal" .)