Consumer items that are cut and polished (5)
I believe the answer is:
teeth
'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?" .)