Philosopher known as the "Father of Thomism" (7)

I believe the answer is:

aquinas

(Other definitions for aquinas that I've seen before include "Sainted theologian" , "St. Thomas --, theologian" , "Old theologian" , "Saint Thomas --, Italian theologian" , "Saintly theologian" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.