Formerly the financial centre for Oriental money (3)

I believe the answer is:

yen

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'money' is the definition.
(Japanese currency)

'formerly the financial centre for oriental' is the wordplay.
'formerly' becomes 'y' (I can't justify this - if you can you should give a lot more credence to this answer).
'centre' indicates the central letters.
'for' means one lot of letters go next to another (I've seen this in other clues).
'oriental' becomes 'e'.
The central letter of 'financial' is 'n'.
'n' after 'e' is 'en'.
'y'+'en'='YEN'

Can you help me to learn more?

(Other definitions for yen that I've seen before include "Longing, hankering after" , "Unit of money in Japan" , "Intense longing" , "change in East" , "Intense desire for a Japanese coin" .)

I've seen this clue in the Evening Standard.

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