"Goodbye Columbus" author
I believe the answer is:
'goodbye columbus author' 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 "Portnoy's Complaint author, d. 2018" , "American Jewish novelist, Philip, b. 1933" , "Philip --, US author" , "Author of Portnoy's Complaint, b. 1933" , "American writer" .)