Yankee statesman is surprisingly "Mr Everton" (9)

I believe the answer is:

vermonter

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'yankee statesman' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'surprisingly mr everton' is the wordplay.
'surprisingly' indicates anagramming the letters (a surprising ordering of the letters).
'mr'+'everton'='mreverton'
'mreverton' is an anagram of 'VERMONTER'.

'is' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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