Rice dish containing a little bit of turkey bone (7)
I believe the answer is:
patella
'bone' is the definition.
(I know that kneecap is a type of bone organ)
'rice dish containing a little bit of turkey' is the wordplay.
'rice dish' becomes 'paella' (I've seen this before).
'containing' means one lot of letters goes inside another.
'a little bit of' says to take the initial letters (the smallest possible amount of the word).
The first letter of 'turkey' is 't'.
'paella' enclosing 't' is 'PATELLA'.
(Other definitions for patella that I've seen before include "Knee bone" , "The formal kneecap" , "showing a bit of leg" , "bit of body usually under trousers!" , "Joint cover" .)