Final authority (3-2)

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3-2

say-so

'final authority' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for say-so that I've seen before include "Authorisation" , "Authority to make or allow something to happen" , "Authority - rumour" , "Authority to make a decision" , "Go-ahead" .)

I've seen this clue in the USA Today, the Universal, the LA Times, the Sydney Morning Herald and the Newsday.

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