Crossword Genius

Ruined, as are three-wheelers and go-karts? (6)

Ross

I believe the answer is:

dashed

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

'ruined' is the definition.

'as are three-wheelers and go-karts?' is the wordplay.
I cannot quite see how this works, but
'as' is present in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for dashed that I've seen before include "completely spoiled" , "Rushed headlong" , "completely destroyed" , "Thrown down as hopes sometimes are" , "Sprinted, rushed" .)

I've seen this clue in The Telegraph.
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