Note about one short bovine leg bone (6)
I believe the answer is:
fibula
'leg bone' is the definition.
(fibula is a kind of leg bone)
'note about one short bovine' is the wordplay.
'note' becomes 'fia' (I am not sure about this - if you are sure you should believe this answer much more).
'about' indicates putting letters inside.
'one short' means to remove the last letter.
'bovine' becomes 'bull' (bulls are bovine animals).
'bull' with its final letter taken off is 'bul'.
'fia' enclosing 'bul' is 'FIBULA'.
Can you help me to learn more?
(Other definitions for fibula that I've seen before include "Bone of the lower leg" , "Outer bone in the calf" , "A lower-leg bone" , "Human leg-bone" .)