Disney character's planet (5)
I believe the answer is:
pluto
I believe this is a double definition.
'disney character's' is the first definition.
(I've seen this before)
'planet' is the second definition.
(Pluto is an example)
(Other definitions for pluto that I've seen before include "Solar system body" , "Disney character - Underworld god - planet" , "that is submerged under water" , "Most remote planet" , "Planet - cartoon dog - God of the Underworld" .)