Mister, one you caught as old forger? (7)

I believe the answer is:

moneyer

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'old forger?' is the definition.
'moneyer' can be an answer for 'forger?' (thesaurus). I'm unsure of the 'old' bit.

'mister one you caught' is the wordplay.
'mister' becomes 'mr' (synonyms).
'you' becomes 'ye' (historical version of 'you').
'caught' indicates putting letters inside.
'one'+'ye'='oneye'
'mr' going around 'oneye' is 'MONEYER'.

'as' acts as a link.

Can you help me to learn more?

(Another definition for moneyer that I've seen is " Person coining it".)

I've seen this clue in The Guardian.

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