One American rubbishes ignorant English (9)

I believe the answer is:

argentino

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'one american' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'rubbishes ignorant english' is the wordplay.
'rubbishes' is an anagram indicator (I've seen 'rubbished' mean this).
'english' becomes 'E' (abbreviation).
'ignorant'+'e'='ignorante'
'ignorante' is an anagram of 'ARGENTINO'.

Can you help me to learn more?

(Another definition for argentino that I've seen is " Native of Buenos Aires".)

I've seen this clue in The Guardian.

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