Sack bank employee (7)
I believe the answer is:
cashier
I believe this clue is a double definition.
'sack' is the first definition.
(I've seen this before)
'bank employee' is the second definition.
(I've seen this before)
(Other definitions for cashier that I've seen before include "Remove from service" , "Bank clerk" , "Bank teller" , "one taking money" , "Fire" .)