African mammal; the tallest living animal (7)
I believe the answer is:
giraffe
I believe this is a double definition.
'african mammal' is the first definition.
(I've seen this before)
'the tallest living animal' is the second definition.
(I've seen this before)
(Other definitions for giraffe that I've seen before include "Tall creature" , "A long-legged creature" , "Large African mammal" , "Tall quadruped" , "Tallest mammal" .)