Whitman or Disney (4)
I believe the answer is:
walt
I believe this clue is a double definition.
'whitman' is the first definition.
(poet Walt Whitman)
'disney' is the second definition.
(Walt Disney)
(Other definitions for walt that I've seen before include "First name of Disney, cartoon creator" , "-- Disney, cartoon maker" , "... Disney (film-maker)" , "-- Whitman; -- Disney" , "Mr Disney" .)