Dismiss bank clerk (7)
I believe the answer is:
cashier
I believe this is a double definition.
'dismiss' is the first definition.
(I've seen this before)
'bank clerk' is the second definition.
(synonyms)
(Other definitions for cashier that I've seen before include "take out of service" , "Dismiss (someone) from the armed forces in disgrace" , "till tender?" , "Dismiss with dishonour from the army" , "I search (anag) - dismiss from armed forces with disgrace" .)