Wrong English cake (5)
I believe the answer is:
torte
'cake' is the definition.
(I know that torte is a type of cake)
'wrong english' is the wordplay.
'wrong' becomes 'tort' (a civil wrong in law).
'english' becomes 'E' (abbreviation).
'tort'+'e'='TORTE'
(Other definitions for torte that I've seen before include "1d [PASTRY]" , "German cream cake" , "Rich food" , "Rich (Austrian) cake or pastry" , "Sweet cake or tart" .)