Crossword Genius

Give the go-ahead for patent (5)

Ross

I believe the answer is:

clear

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'for patent' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

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(Other definitions for clear that I've seen before include "Easy to see or understand" , "Open; not cloudy" , "Bright" , "Transparent - free of obstruction" , "Obvious; jump over" .)

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