Greek character's Kitty wants the Spanish wine (8)
I believe the answer is:
muscatel
'wine' is the definition.
(I know that Muscatel is a type of wine)
'greek character's kitty wants the spanish' is the wordplay.
'greek character's' becomes 'mu's' (Greek letter).
'kitty' becomes 'cat'.
'wants' is a charade indicator (letters next to each other).
'the spanish' becomes 'el' ('the' in Spanish).
'mus'+'cat'+'el'='MUSCATEL'
(Other definitions for muscatel that I've seen before include "Sweet aromatic grape used for raisins, wine" , "Sweet grape variety" , "Rich sweet wine" , "Flavoured wine made with calumets" , "drink" .)