Arrive at, as a solution (3,2)

I think it could be either:

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3,2

hit on

'arrive at as a solution' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for hit on that I've seen before include "Discovered suddenly or, in modern slang, made advances towards" , "Serendipitously find" , "Try to get off with" , "Discover (something) by chance" , "Discover; single out" .)

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