Bone in neck ape fractured (7)
I believe the answer is:
kneecap
'bone' is the definition.
(I know that kneecap is a type of bone)
'neck ape fractured' is the wordplay.
'fractured' is an anagram indicator.
'neck'+'ape'='neckape'
'neckape' with letters rearranged gives 'KNEECAP'.
'in' acts as a link.
(Other definitions for kneecap that I've seen before include "one going on bender?" , "Joint protection" , "Horribly punish" , "Bone" , "The informal patella (7)" .)