Seating arrangement at the bank? (4)
I believe the answer is:
tier
This clue might be a double definition.
'seating arrangement' is the first definition.
'tier' can be an answer for 'arrangement' (tier is a kind of arrangement). I'm unsure of the 'seating' bit.
'the bank?' is the second definition.
(both can mean a row of similar things)
'at' is the link.
Can you help me to learn more?
(Other definitions for tier that I've seen before include "Level within hierarchy" , "Rite about layer" , "Rank - order" , "Row (of seats)" , "I might draw" .)