Cousins of giraffes (6)
I believe the answer is:
okapis
'cousins of giraffes' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for okapis that I've seen before include "They're similar to the giraffes but smaller" , "Giraffe-like animals with shorter necks" , "Relatives of the giraffe" , "They're like giraffes only smaller" , "Animals similar to the giraffe but with shorter necks" .)