Moving to China, to an ancient city (7)
I believe the answer is:
antioch
'an ancient city' is the definition.
(ancient Greek city)
'moving to china' is the wordplay.
'moving' indicates an anagram.
'to'+'china'='tochina'
'tochina' anagrammed gives 'ANTIOCH'.
'to' acts as a link.
(Other definitions for antioch that I've seen before include "Place for early Christians" , "Ancient city now Antakya" , "Ancient name for Antakya in Turkey" , "Early centre of Christianity" , "Ancient Syria capital" .)