Major film studio that gave the world Mickey Mouse (6)

I believe the answer is:

disney

(Other definitions for disney that I've seen before include "Famous animator" , "Walt, great cartoon maker" , "Walt, pioneer of cartoon films" , "Wealthy (informal)" , "Creator of Donald Duck" .)

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.