Like a polymath's knowledge (5)

I believe the answer is:

broad

(Other definitions for broad that I've seen before include "Wide; general" , "Open" , "River expansion" , "Catholic" , "Covering a wide range" .)

I've seen this clue in the Universal.

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.