China and Japan etc are parting quickly (3,4)
I believe the answer is:
far east
'china' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'japan etc are parting quickly' is the wordplay.
I cannot quite see how this works, but
an anagram of 'are' is 'rea' which is present in the answer.
'quickly' could be 'fast' (synonyms) and 'fast' is found in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Other definitions for far east that I've seen before include "China, Japan and other remote Asian countries" , "The Orient" , "Region containing Japan" , "China, Korea, Japan, etc" , "remotest Siberia, perhaps" .)