Camelopard (7)
I believe the answer is:
giraffe
'camelopard' is the definition.
(I know that camelopard can be written as giraffe)
This is the entire clue.
(Other definitions for giraffe that I've seen before include "A long-legged creature" , "Tallest extant quadruped" , "Animal once known as a camelopard" , "Sixteen, mostly neck" , "Long - necked animal" .)