Crossword Genius

Cold lighting unpopular with motorists! (6)

Ross

I believe the answer is:

clamps

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

'motorists' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.

'cold lighting unpopular' is the wordplay.
I cannot really understand how this works, but
'cold' could be 'c' (eg on taps) and 'c' is found within the answer.
The remaining letters 'lamps' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.
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