Fruit found in illuminated character of Greek text (6)
I believe the answer is:
litchi
'fruit' is the definition.
(litchi is a kind of fruit)
'illuminated character of greek text' is the wordplay.
'illuminated' becomes 'lit' ('lit' can be a synonym of 'illuminated').
'character of greek text' becomes 'chi'.
'lit'+'chi'='LITCHI'
'found in' acts as a link.
(Other definitions for litchi that I've seen before include "Asian tree" , "Chinese tree; its fruit" , "Edible Chinese fruit" , "piece of fruit" .)