Bank employee at the information desk? (6)

I believe the answer is:

teller

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'bank employee' is the definition.
(as in a bank teller)

I don't understand the rest of the clue.

(Other definitions for teller that I've seen before include "One records cash" , "One introducing relation" , "Bank cashier or narrator of story" , "Cashier - vote counter - narrator" , "One who instructs" .)

I've seen this clue in the Evening Standard.

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