Badly lit Korean vessel (3,6)
I believe the answer is:
oil tanker
'vessel' is the definition.
(oil tanker is a kind of vessel)
'badly lit korean' is the wordplay.
'badly' indicates an anagram.
'lit'+'korean'='litkorean'
'litkorean' is an anagram of 'OIL-TANKER'.
(Other definitions for oil tanker that I've seen before include "Fuel transport ship" , "Ship carrying "black gold"" , "craft" , "Ship carrying fuel" , "Fuel transporter" .)