Antelope smell covering human smell? (6)
I believe the answer is:
reebok
'antelope' is the definition.
(I've seen this before)
'smell covering human smell?' is the wordplay.
'smell' becomes 'reek' (reek is a kind of smell).
'covering' is an insertion indicator.
'human smell?' becomes 'bo' (body odour).
'reek' enclosing 'bo' is 'REEBOK'.
(Other definitions for reebok that I've seen before include "South African antelope (E, not H)" , "African runner" , "Antelope of southern Africa" , "South African animal" .)