Crossword Genius

Clear evidence of invention (6)

Ross

I believe the answer is:

patent

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'clear' is the definition.
(synonyms)

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(Other definitions for patent that I've seen before include "licence inside" , "The right to an invention is clear" , "Flagrant" , "Obvious - protection for inventors" , "plain" .)

I've seen this clue in The Irish Times.
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