Crossword Genius

Consumer items that are cut and polished (5)

Ross

I believe the answer is:

teeth

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

'consumer items' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for teeth that I've seen before include "Gearwheel projections" , "Saw or gearwheel items" , "watchdog needs these" , "Projections on a gear" , "symbols of legal power?" .)

I've seen this clue in The Guardian and The Globe and Mail.
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