Verdi's seminal piece about Argentinian scoring genius (5)

I believe the answer is:

messi

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'argentinian scoring genius' is the definition.
I know nothing about this answer so I can't judge whether this works.

'verdi's seminal piece about' is the wordplay.
'piece' indicates a hidden word.
'about' says the letters should be written in reverse.
'issem' is hidden in the letters of 'verdis seminal'.
'issem' written backwards gives 'MESSI'.

Can you help me to learn more?

(Another definition for messi that I've seen is " Footballer".)

I've seen this clue in The Irish Times.

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