Dismiss a money handler (7)
I believe the answer is:
cashier
I believe this clue is a double definition.
'dismiss' is the first definition.
(I've seen this before)
'a money handler' is the second definition.
(I've seen this before)
(Other definitions for cashier that I've seen before include "Sack" , "one taking money" , "money dispenser" , "One handling money" , "One working till" .)