Be highly agreeable or equable? (5)

I believe the answer is:

tally

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'be' is the definition.
(tallying is a kind of being)

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

(Other definitions for tally that I've seen before include "Reckoning of a debt or of votes" , "Total score" , "Mark" , "Record; current score" , "label" .)

I've seen this clue in the Evening Standard.

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