Crossword Genius

They go on wheels, but there's no progress (6)

Ross

I believe the answer is:

clamps

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'they' is the definition.
Both the answer and definition are plural nouns.
Perhaps you can see an association between them that I don't see?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for clamps that I've seen before include "Grips" , "fasteners" , "Device to hold things, car wheels say" , "Devices to hold things, car wheels say" , "Holds tightly with device - illegally parked cars? (6)" .)

I've seen this clue in the Evening Standard.
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