Crossword Genius

For music, improves the pitch (5)

Ross

I believe the answer is:

tunes

I'm a little stuck... Click here to teach me more about this clue!

'for music improves the pitch' is the definition.
I can't judge whether this defines the answer.

'music improves the pitch' is the wordplay.
'music' becomes 'tune' (tune is a kind of music).
'improves the pitch' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'tune'+'s'='TUNES'

Can you help me to learn more?

(Another definition for tunes that I've seen is " Airs, melodies".)

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