Aesop story (5)
I believe the answer is:
fable
'aesop story' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for fable that I've seen before include "It's not true" , "Moral tale" , "there may be a moral to it" , "One of Aesop's tales" , "Aesop story" .)