Informant at bank (6)
I believe the answer is:
teller
This might be a double definition.
'informant' is the first definition.
(thesaurus)
'bank' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'at' is the link.
Can you help me to learn more?
(Other definitions for teller that I've seen before include "Bank official or narrator" , "Bank cashier or narrator of story" , "Narrator and bank clerk" , "Election official" , "One who instructs" .)