Is it used to eat Chinese pork? Yes (9)
I believe the answer is:
chopstick
'pork? yes' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'is it used to eat chinese' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
'chinese' could be 'ch' (abbreviation) and 'ch' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chopstick that I've seen before include "member of consumer association" , "Oriental eating utensil" , "In the plural, they're oriental cutlery" , "Eastern eating utensil" .)