Bone from bird included in total (7)
I believe the answer is:
sternum
'bone' is the definition.
(sternum is a kind of bone)
'bird included in total' is the wordplay.
'bird' becomes 'tern' (tern is a kind of bird**).
'included in' means one lot of letters goes inside another.
'total' becomes 'sum' ('sum' can be a synonym of 'total').
'tern' placed inside 'sum' is 'STERNUM'.
'from' acts as a link.
(Other definitions for sternum that I've seen before include "front of breast" , "Chest bone" , "Human bone -- ten rums (anag)" , "somewhere in chest" , "big bone" .)