Crossword Genius

Backing car, around which walkers with torch finally set out at night? (5,5)

Ross

I believe the answer is:

false teeth

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'set out at night?' is the definition.
(I've seen this before)

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

Can you help me to learn more?

(Other definitions for false teeth that I've seen before include "set out at night" , "Denture's components" , "Plates" , "New gnashers!" , "Choppers that may be taken out" .)

I've seen this clue in The Guardian.
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