Greek character has German swine (3)
I believe the answer is:
pig
'swine' is the definition.
(I know that Pig is a anthropomorphic pig)
'greek character has german' is the wordplay.
'greek character' becomes 'pi' (letter from the Greek alphabet).
'has' says to put letters next to each other.
'german' becomes 'g' (abbreviation).
'pi'+'g'='PIG'
(Other definitions for pig that I've seen before include "Domestic swine" , "Sow, perhaps" , "Glutton" , "Porcine animal" , "Greedy person (colloq.)" .)