Mickey Mouse's contribution to the solar system? (5)
I believe the answer is:
pluto
'solar system?' is the definition.
(thesaurus)
'mickey mouse's contribution to' is the wordplay.
I cannot really understand how this works, but
'to' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'the' acts as a link.
Can you help me to learn more?
(Other definitions for pluto that I've seen before include "Planet - cartoon dog - God of the Underworld" , "Ninth planet of solar system" , "It used to be a planet" , "recently losing status within star system" , "Dog star" .)