Vessel from China or Taiwan (5)
I believe the answer is:
aorta
'vessel' is the definition.
(aorta is a kind of vessel)
'from china or taiwan' is the wordplay.
'from' says the answer is hidden in the clue.
'AORTA' can be found hidden inside 'china or taiwan'.
(Other definitions for aorta that I've seen before include "A rota (anag)" , "Main artery from heart" , "Trunk artery from the heart" , "main arterial route" , "Body's main artery" .)