Mozart's contribution to The Planets? (7)

I believe the answer is:

jupiter

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'mozart's' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I don't see?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for jupiter that I've seen before include "Large planet" , "Planet - Roman equivalent of Zeus" , "Largest planet in our solar system" , "Fifth planet from sun" , "Piece of Holst" .)

I've seen this clue in the Evening Standard.

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