Communication system for partners screened by Coca-Cola (4)

I believe the answer is:

acol

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'communication system for partners' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'screened by coca-cola' is the wordplay.
'screened by' indicates the answer is hidden within the clue.
'ACOL' is hidden within 'coca cola'.

Can you help me to learn more?

(Other definitions for acol that I've seen before include "Bidding system in bridge" , "often seen in bridge" , "Way to bid" , "Bridge convention" .)

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