Very best (7)

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14*

optimum

'very best' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for optimum that I've seen before include "Most favourable (conditions)" , "The best possible" , "Most favourable amount" , "model" , "Most appropriate" .)

I've seen this clue in The Times and the King Feature Syndicate.

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