Crossword Genius

Pulls a fast one on riverside banks (6)

Ross

I believe the answer is:

bluffs

'banks' is the definition.
(bluff is a kind of bank)

I don't understand how the rest of the clue works.

(Other definitions for bluffs that I've seen before include "Attempts a deception as in poker" , "Frightens off someone by pretending to be stronger than you are" , "Pretends the cards are better than they are" , "Pretends to have a good hand in poker" , "Tries to deceive as in poker game" .)

I've seen this clue in the Sydney Morning Herald.
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