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On these, there's a fair chance of bumping into people (7)

Ross

I believe the answer is:

dodgems

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'people' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how they can define each other.

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

Can you help me to learn more?

(Other definitions for dodgems that I've seen before include "Fairground cars" , "fair features" , "fair source of revenue" , "Fairground attraction" .)

I've seen this clue in the Evening Standard.
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