Funny sounding bone (7)
I believe the answer is:
humerus
'bone' is the definition.
(I know that humerus is a bone)
'funny sounding' is the wordplay.
'funny' becomes 'humorous' (similar in meaning).
'sounding' indicates a 'sounds like' (homophone) clue.
'humorous' sounds like 'HUMERUS'.
(Other definitions for humerus that I've seen before include "Arm bone (that sounds comical)" , "Arm bone - the "funny bone"" , "Boneo of the upper arm" , "Upper-arm bone" , "Upper arm bone" .)