A hot topic: worldwide conflict with China? (6,7)
I believe the answer is:
global warming
'a hot topic worldwide conflict with china?' is the definition.
I can't judge whether this definition defines the answer.
'worldwide conflict with china?' is the wordplay.
'worldwide' becomes 'global' (synonyms).
'conflict' becomes 'war' (war is a kind of conflict).
'with' means one lot of letters go next to another.
'china?' becomes 'ming' (Chinese porcelain from the Ming dynasty).
'global'+'war'+'ming'='GLOBAL WARMING'
Can you help me to learn more?
(Other definitions for global warming that I've seen before include "Peril for the earth" , "change in the atmosphere" , "Heating up of the earth" , "Climate change" , "General temperature rise" .)