Visitor to China has nothing to pack up before game (5,4)
I believe the answer is:
marco polo
'visitor to china has nothing to pack' is the definition.
I can't tell whether this definition defines the answer.
'up before game' is the wordplay.
'up before' becomes 'marco' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'game' becomes 'polo' (polo is a kind of game).
'marco'+'polo'='MARCO POLO'
Can you help me to learn more?
(Other definitions for marco polo that I've seen before include "Italian traveller" , "Merchant of Venice" , "Great Venetian explorer of China and Asia in 14th century" , "Old travelling salesman" , "European traveller" .)