Sound of a crowd or the ocean (4)

I believe the answer is:

roar

(Other definitions for roar that I've seen before include "Deep loud sound as of lion or bull" , "Loud cry" , "24 [BOOM]" , "Lion's call" , "Shout loudly" .)

I've seen this clue in The Wall Street Journal.

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.