Shoulder bone (7)
I believe the answer is:
scapula
'shoulder bone' is the definition.
(I know that shoulder bone can be written as scapula)
This is all the clue.
(Other definitions for scapula that I've seen before include "Shoulder-blade" , "Shoulder-bone" , "Shoulder blade" , "Flat, triangular human bone - cap Saul (anag)" .)