Crossword Genius

Adds with fingers (4)

Ross

I believe the answer is:

tots

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This clue could be a double definition.

'adds' is the first definition.
('tot' can be a synonym of 'add')

'fingers' is the second definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Maybe you can see an association between them that I can't see?

'with' is the link.

Can you help me to learn more?

(Other definitions for tots that I've seen before include "Finds the sum" , "little people" , "Adds up like small children" , "Little children" , "Babies" .)

I've seen this clue in The Guardian.
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