South African antelope (6)
I believe the answer is:
reebok
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">south african antelope</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for reebok that I've seen before include "South African antelope (E, not H)" , "Antelope of southern Africa" , "African runner" , "South African animal" .)