Crossword Genius

Italian race's banking arrangement (4)

Ross

I believe the answer is:

giro

I'm a little stuck... Click here to teach me more about this clue!

'arrangement' is the definition.
The definition and answer can be both groups as well as being singular nouns.
Maybe there's an association between them I don't understand?

'italian race's banking' is the wordplay.
'italian' becomes 'I' (abbreviation for Italian).
'race's' becomes 'gro' (I can't justify this - if you can you should believe this answer much more).
'banking' means one lot of letters goes inside another.
'i' placed inside 'gro' is 'GIRO'.

Can you help me to learn more?

(Other definitions for giro that I've seen before include "System for monetary transfers used for unemployment benefit etc" , "dish from Greece" , "System of electronic credit transfer" , "Cheque" , "Credit transfer; sounds like stable spinning wheel" .)

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