Wrong base for cake (5)
I believe the answer is:
torte
'cake' is the definition.
(torte is a kind of cake)
'wrong base' is the wordplay.
'wrong' becomes 'tort' (legal term).
'base' becomes 'e' (I've seen this in other clues).
'tort'+'e'='TORTE'
'for' is the link.
(Other definitions for torte that I've seen before include "(Austrian) cake with cream and fruit or nuts" , "Sweet cake or tart" , "Rich (Austrian) cake or pastry" , "Sweet cake (from Ger.)" , "Rich food" .)