Some banks go to this Manhattan street (4)
I believe the answer is:
wall
'street' is the definition.
(I know that wall is a type of embankment)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for wall that I've seen before include "See 14" , "Barrier - side of room" , "Room divider" , "A challenge for the mountaineer" , "Brick/stone barrier" .)