Perfect confession by trader? (5)

I believe the answer is:

ideal

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'perfect' is the definition.
(similar in meaning)

I don't understand the remainder of the clue.

(Other definitions for ideal that I've seen before include "Perfect for the purpose" , "Exemplar" , "Perfect; a standard of perfection" , "fanciful" , "Model of perfection" .)

I've seen this clue in the Sydney Morning Herald.

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