In song sailor lands faraway (6)
I believe the answer is:
arabia
'lands faraway' is the definition.
I can't judge whether this definition defines the answer.
'in song sailor' is the wordplay.
'in' is an insertion indicator.
'song' becomes 'aria' (piece of music in an opera).
'sailor' becomes 'ab' (abbreviation for able seaman).
'aria' enclosing 'ab' is 'ARABIA'.
Can you help me to learn more?
(Other definitions for arabia that I've seen before include "Peninsula in southwest Asia" , "Middle Eastern region" , "where many travel in caravans" , "Middle East region" , "Saudi - -" .)