Vicious for one English bank (4)
I believe the answer is:
side
'bank' is the definition.
('side' can be a synonym of 'bank')
'vicious for one english' is the wordplay.
'vicious' becomes 'sid' (Sid Vicious).
'for' says to put letters next to each other.
'one english' becomes 'e' (abbreviation).
'sid'+'e'='SIDE'
(Other definitions for side that I've seen before include "Face - team" , "English" , "Dies for own team" , "Aspect, sports team" , "Pretentious air" .)