Narrator and bank clerk (6)
I believe the answer is:
teller
'narrator and bank clerk' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for teller that I've seen before include "one who counts" , "Cashier - vote counter - narrator" , "who worked on the hydrogen bomb" , "Edward ---, physicist; vote-counter" , "Narrator and bank clerk" .)