Geordie resident misguidedly investing yen (9)

I believe the answer is:

tynesider

'geordie' is the definition.
(I've seen this before)

'resident misguidedly investing yen' is the wordplay.
'misguidedly' is an anagram indicator.
'investing' is an insertion indicator (inserted letters are taken in or invested).
'yen' becomes 'y' (resembles the symbol for the currency of Japan).
'resident' with letters rearranged gives 'tnesider'.
'tnesider' enclosing 'y' is 'TYNESIDER'.

(Another definition for tynesider that I've seen is " Geordie".)

I've seen this clue in The Telegraph.

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