Greek character returned and dined (3)
I believe the answer is:
ate
'dined' is the definition.
'greek character returned' is the wordplay.
'greek character' becomes 'eta' (letter from the Greek alphabet).
'returned' is a reversal indicator.
'eta' back-to-front is 'ATE'.
'and' is the link.
(Other definitions for ate that I've seen before include "Devoured" , "upset > Greek goddess" , "Consumed food" , "Ingested" , "Munched" .)