Fabulous writer? (5)
I believe the answer is:
aesop
'fabulous writer?' is the definition.
(writer of fables)
This is all the clue.
(Other definitions for aesop that I've seen before include "Author of many fables" , "story teller" , "So ape the writer of fables" , "Fable-teller" , "Great Greek teller of animal fables" .)