Like Keats's urn (7)
I believe the answer is:
grecian
'like keats's urn' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for grecian that I've seen before include "of ancient Olympia, say" , "Relating to ancient Greece" , "Athenian man" , "straight sort of nose" , "Attic" .)