Major city of ancient Crete (7)
I believe the answer is:
knossos
'major city of ancient crete' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for knossos that I've seen before include "labyrinth" , "Minoan site on Crete" , "Ancient Cretan city" , "Minoan ruin in Crete" , "tourist attraction in Med" .)