Rush to the ruins of Athens (6)
I believe the answer is:
hasten
'rush' is the definition.
('hasten' can be a synonym of 'rush')
'the ruins of athens' is the wordplay.
'the ruins of' indicates an anagram.
'athens' anagrammed gives 'HASTEN'.
'to' is the link.
(Other definitions for hasten that I've seen before include "dash" , "Hurry up in old-fashioned way" , "Rush" , "race? - with 26a" , "Step up" .)