Africans buy UK IKEA retro covers (6)
I believe the answer is:
kikuyu
'africans' is the definition.
(Kenyan ethnic group)
'buy uk ikea retro covers' is the wordplay.
'covers' indicates the answer is hidden within the clue (I've seen 'covering' mean this).
'retro' says the letters should be written in reverse (retro is Latin for 'backwards').
'uyukik' is hidden in the letters of 'buy uk ikea'.
'uyukik' reversed gives 'KIKUYU'.
(Other definitions for kikuyu that I've seen before include "Agricultural people of Kenya" , "African tribe" .)