Bank job making an impact (7)

I believe the answer is:

telling

I believe this clue is a double definition.

'bank job' is the first definition.
(what a bank teller does)

'making an impact' is the second definition.
(something telling has impact or importance)

(Other definitions for telling that I've seen before include "Powerful - effective" , "relation" , "Powerful; relating" , "Effective - narration" , "Providing information" .)

I've seen this clue in The Times.

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