Having gone wrong about the right conclusion, do well (3,2)

I believe the answer is:

get on

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'do well' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for get on that I've seen before include "Board vehicle or make progress" , "Agree - embark - make progress" , "fare" , "Board - prosper" , "Advance; prosper" .)

I've seen this clue in the Evening Standard.

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