Creator of a cocky hare (5)
I believe the answer is:
aesop
'creator of a cocky hare' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aesop that I've seen before include "Greek teller of animal tales with a moral" , "satirical writer" , "Greek author of fables (c 620-560 BC)" , "very old writer" , "Greek fable writer" .)