Useless vessel? (4)
I believe the answer is:
junk
'vessel?' is the definition.
(type of Asian ship)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for junk that I've seen before include "Scrap" , "ship" , "Transport" , "Sailing vessel; rubbish" , "Discarded items - Chinese sailing vessel" .)