"Portnoy's Complaint” author Philip (4)
I believe the answer is:
roth
'portnoy's complaint author philip' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for roth that I've seen before include "American writer" , "Philip --, US author" , "Portnoy's Complaint author, d. 2018" , "American Jewish novelist, Philip, b. 1933" , "Author of Portnoy's Complaint, b. 1933" .)