After unfinished sweet, also called for Greek dish (8)
I believe the answer is:
moussaka
'greek dish' is the definition.
(I've seen this before)
'after unfinished sweet also called' is the wordplay.
'after' means one lot of letters go next to another.
'unfinished' means to remove the last letter.
'sweet' becomes 'mousse' (type of dessert or sweet).
'also called' becomes 'aka' (also known as).
'mousse' with its final letter removed is 'mouss'.
'mouss'+'aka' is 'MOUSSAKA'.
'for' is the link.
(Other definitions for moussaka that I've seen before include "savoury dish" , "Greek dish of minced lamb, aubergines, etc" , "Greek aubergine-based dish" , "Greek dish of layers of minced meat, aubergine etc topped with cheese sauce" , "Greek dish of mince layers, aubergine and cheese sauce" .)