Sweet cake or tart (5)
I believe the answer is:
torte
This clue is a double definition.
'sweet cake' is the first definition.
(I've seen this before)
'tart' is the second definition.
(I've seen this before)
(Other definitions for torte that I've seen before include "Sweet cake (from Ger.)" , "Rich food" , "German cream cake" , "Sweet cake or tart" , "Rich (Austrian) cake or pastry" .)