Children's writer Blyton (4)
I believe the answer is:
enid
'children's writer blyton' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for enid that I've seen before include "Dine with Ms blyton, writer" , "Dine out on this girl's name also" , "Arthurian wife" , "Miss Blyton" , "W - - Blyton" .)