Court hearing about bakery product (8)
I believe the answer is:
tribunal
'court' is the definition.
(I know that court can be written as tribunal)
'hearing about bakery product' is the wordplay.
'hearing' becomes 'trial' (as in a court case).
'about' means one lot of letters goes inside another.
'bakery product' becomes 'bun'.
'trial' placed around 'bun' is 'TRIBUNAL'.
(Other definitions for tribunal that I've seen before include "Court appointed to look into a particular matter" , "Adjudicating board" , "examination" , "Court of arbitration - unlit bar (anag)" , "Official board" .)