Crossword Genius

Come to a conclusion (6)

Ross

I think it could be either:

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3

6

decide

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'come' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for decide that I've seen before include "Conclude" , "Resolve or give a judgment" , "Choose" , "Make a judgment" , "Adjudicate" .)

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