Creator of Mickey and Donald (4)
I believe the answer is:
walt
'creator of mickey and donald' 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 "- Disney, cartoonist" , "-- Whitman, US poet" , "-- Disney, cartoon maker" , "... Disney (film-maker)" , "First name of Disney, cartoon creator" .)