Story about bank's original board (5)
I believe the answer is:
table
'board' is the definition.
('table' can be a synonym of 'board')
'story about bank's original' is the wordplay.
'story' becomes 'tale' ('tale' can be a synonym of 'story').
'about' is an insertion indicator.
'original' indicates taking the first letters.
The initial letter of 'banks' is 'b'.
'tale' enclosing 'b' is 'TABLE'.
(Other definitions for table that I've seen before include "Chart; put forward" , "Move; furniture" , "Put forward for formal discussion" , "Horizontal furniture" , "Feature of restaurant" .)