Greek sea (6)
I believe the answer is:
'greek sea' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aegean that I've seen before include "Greek-Turkish sea" , "Sea between Greece and Turkey" , "Part of the Mediterranean Sea" , "'Gee, Ana is all at sea (6)'" , "Sea around Lesbos" .)