China's largest city (8)
I believe the answer is:
shanghai
'china's largest city' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for shanghai that I've seen before include "Port city on the Yangtze estuary" , "Trick into naval service" , "Large Chinese city" , "Exhibit haircut on sailor's head in" , "Press into service" .)