Spiral-horned animal (5)
I believe the answer is:
eland
'spiral-horned animal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for eland that I've seen before include "wild creature" , "Ruminant" , "Large African antelope with spiral horns" , "Spiral-horn antelope" , "Largest living antelope" .)