Bank employee Eric has upset (7)
I believe the answer is:
cashier
'bank employee' is the definition.
(someone working in a bank)
'eric has upset' is the wordplay.
'upset' is an anagram indicator.
'eric'+'has'='erichas'
'erichas' with letters rearranged gives 'CASHIER'.
(Other definitions for cashier that I've seen before include "Discharge" , "employee accepting money" , "Bank employee" , "person dealing in LSD, say, once?" , "I search (anag) - dismiss from armed forces with disgrace" .)