Glossy paint (6)

I think it could be either:

Which length description are you looking for?:

enamel

'glossy paint' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for enamel that I've seen before include "Glassy substance" , "Hard substance covering teeth" , "Hard shiny coating as on teeth" , "protection for canines?" , "Coating for a tooth" .)

I've seen this clue in the Penny Press, The Star Tribune and The Guardian.

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