Bank runs cathedral city (4)
I believe the answer is:
rely
'bank' is the definition.
(to bank on is to rely on)
'runs cathedral city' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'cathedral city' becomes 'ely' (I've seen this before).
'r'+'ely'='RELY'
(Other definitions for rely that I've seen before include "Depend (upon)" , "Count" , "City with cathedral" , "Be dependent" , "Depend, bank" .)