Stories with a moral (6)
I believe the answer is:
fables
'stories with a moral' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for fables that I've seen before include "Myths and legends" , "Aesop wrote a lot of them" , "Tales from Aesop" , "Aesop wrote many of them" , "Tall tales like Aesop's" .)