"The Witches of Eastwick" author (6)
I believe the answer is:
updike
'the witches of eastwick author' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for updike that I've seen before include "John --, US author" , "John --, US novelist" , "American author, John, b.1932" , "John ---, Rabbit novelist" .)