Roman Catholic prince (8)

I believe the answer is:

cardinal

'roman catholic prince' is the definition.
(leading dignitary of the Roman Catholic Church)

This is the entire clue.

(Other definitions for cardinal that I've seen before include "Prince of the Roman Catholic Church" , "High-ranking official of the Roman Catholic church" , "of prime importance" , "Main - church dignitary" , "Principal - churchman" .)

I've seen this clue in The Sun.

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.