Half-hidden point inside a tooth (7)
I believe the answer is:
dentine
'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.)" .)