As good as it gets (5)

I think it could be either:

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ideal

'as good as it gets' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ideal that I've seen before include "Paradigm" , "Model of ethical behaviour" , "without a flaw" , "Exemplar" , "'Perfect, model (5)'" .)

I've seen this clue in the Penny Press, The Guardian, The New York Times and the LA Times.

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