Creator of Mickey and Goofy (4)
I believe the answer is:
walt
'creator of mickey and goofy' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for walt that I've seen before include "First name of Disney, cartoon creator" , "-- Whitman; -- Disney" , "-- Whitman, US poet" , "-- Disney, cartoon maker" , "Mr Disney" .)