Crossword Genius

Half-hidden point inside a tooth (7)

Ross

I believe the answer is:

dentine

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'a tooth' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'half-hidden point' is the wordplay.
'half' suggests halving the letters.
'point' becomes 'tine' (I've seen this in other clues).
'hidden' cut in half is 'den'.
'den'+'tine'='DENTINE'

'inside' acts as a link.

Can you help me to learn more?

(Other definitions for dentine that I've seen before include "Material in teeth" , "which forms tooth" , "Tooth material" , "Substance of which teeth are mainly composed" , "Tin need (anag.)" .)

I've seen this clue in The Daily Express.
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