Crossword Genius

US approval for exit perhaps (3,2,2)

Ross

I believe the answer is:

way to go

I'm a little stuck... Click here to teach me more about this clue!

'us approval' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'for exit perhaps' is the wordplay.
I cannot really understand how this works, but
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is located in the answer.
'exit' could be 'go' (synonyms) and 'go' is present in the answer.
The remaining letters 'way' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for way to go that I've seen before include "Director gives one" , "Directions" , "give American encouragement" , "Amazing" , "Well done" .)

I've seen this clue in The Guardian.
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