They acquaint one with the people who count (7)

I believe the answer is:

tellers

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'people who count' is the definition.
'tellers' can be an answer for 'people' (teller is a kind of person). I am unsure of the rest of the definition.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for tellers that I've seen before include "who are recounting" , "Vote counters" , "Bank employees" , "Bank cashiers" .)

I've seen this clue in the Evening Standard.

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