Tearing apart camel bone (10)
I believe the answer is:
metacarpal
'bone' is the definition.
(I know that metacarpal is a type of bone)
'tearing apart camel' is the wordplay.
'tearing' indicates an anagram.
'apart'+'camel'='apartcamel'
'apartcamel' with letters rearranged gives 'METACARPAL'.
(Other definitions for metacarpal that I've seen before include "Bone in hand" , "part of body" .)