Antelope made into sportswear (6)
I believe the answer is:
reebok
'antelope' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for reebok that I've seen before include "South African animal" , "South African antelope (E, not H)" , "African runner" , "Antelope of southern Africa" .)