China economy centres around this body of water (5)
I believe the answer is:
ocean
This could be a double definition.
'china economy centres around this body' is the first definition.
'ocean' can be an answer for 'body' (I have seen 'Body of water ' mean 'ocean' so perhaps 'body' could also mean 'ocean'). I am unsure of the remainder of the definition.
'water' is the second definition.
(ocean is a kind of water)
'of' acts as a link.
Can you help me to learn more?
(Other definitions for ocean that I've seen before include "Large expanse of water" , "Large amount of water and" , "Vast sea" , "Indian or Arctic, say" , "Main" .)