Crossword Genius

Depositing anti-monarchist slogan? (7)

Ross

I believe the answer is:

banking

'depositing' is the definition.
('bank' can be a synonym of 'deposit')

I cannot understand how the remainder of the clue works.

(Other definitions for banking that I've seen before include "Engaging in the business of depositing and lending money" , "Depositing and withdrawing money" , "(Of aircraft) turning" , "Relying" , "financial activity" .)

I've seen this clue in The Times.
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