Where Marco Polo went wandering in a yacht (6)
I believe the answer is:
cathay
'where marco polo went' is the definition.
The definition suggests a singular noun which matches the answer.
'wandering in a yacht' is the wordplay.
'wandering in' indicates an anagram (I've seen this in other clues).
'a'+'yacht'='ayacht'
'ayacht' is an anagram of 'CATHAY'.
Can you help me to learn more?
(Other definitions for cathay that I've seen before include "Name for China in medieval times" , "Name for China in medieval Europe" , "Literary name for China" , "Old name for China with a feline to start" , "Old word for China" .)