Steep banks (6)
I believe the answer is:
bluffs
'steep banks' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bluffs that I've seen before include "Pretends the cards are better than they are" , "Tries to deceive as in poker game" , "Frightens off someone by pretending to be stronger than you are" , "Pretends to have a good hand in poker" , "Attempts a deception as in poker" .)