Crossword Genius

This tuned rendering melodious note? (1,4,3)

Ross

I believe the answer is:

o sole mio

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

'this tuned rendering melodious' is the definition.
I know nothing about this answer so I can't tell whether this works.

'note?' is the wordplay.
I cannot really see how this works, but
'note?' could be 'sol' (I've seen this before) and 'sol' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for o sole mio that I've seen before include "Air" , "It's Now or Never used this Italian song" , "Italian original of Presley's It's Now or Never" , "Italian song anglicised as It's Now or Never" , "Italian tune" .)

I've seen this clue in The Telegraph.
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