Bony parts of crown broken by girl (8)
I believe the answer is:
patellae
'bony parts' is the definition.
'patellae' can be an answer for 'parts' (patella is a kind of part). I am unsure of the 'bony' bit.
'crown broken by girl' is the wordplay.
'crown' becomes 'pate' (synonyms).
'broken by' means one lot of letters goes inside another.
'girl' becomes 'ella'.
'pate' placed around 'ella' is 'PATELLAE'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for patellae that I've seen before include "Bones" , "Bony bits" , "Late leap twisted kneecaps" , "The formal kneecaps" .)