Wrong end of Dundee cake (5)
I believe the answer is:
torte
'cake' is the definition.
(I know that torte is a type of cake)
'wrong end of dundee' is the wordplay.
'wrong' becomes 'tort' (legal term).
'end of' indicates one should take the final letters.
The last letter of 'dundee' is 'e'.
'tort'+'e'='TORTE'
(Other definitions for torte that I've seen before include "Rich food" , "1d [PASTRY]" , "German cream cake" , "Rich (Austrian) cake or pastry" , "Sweet cake (from Ger.)" .)