Crossword Genius

Flip round something which isn’t working (2-2)

Ross

I believe the answer is:

no-go

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

'flip round something which isn't working' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I don't see?

'flip round' is the wordplay.
I cannot quite understand how this works, but
'round' could be 'o' (round can mean a round object) and 'o' is found within the answer.
The remaining letters 'ngo' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for no-go that I've seen before include "Area to which access is prevented, by paramilitaries, say" , "Barricaded area" , "Not possible, futile" , "Hopeless (informal)" , "Impossible task for goon" .)

I've seen this clue in The Times.
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