Great musician's sixth foreign tour, returning overseas (8)
I believe the answer is:
virtuoso
'great musician's' is the definition.
'virtuoso' can be an answer for 'musician's' (thesaurus). I'm unsure of the 'great' bit.
'sixth foreign tour returning overseas' is the wordplay.
'sixth' becomes 'VI' (Roman numerals).
'foreign' is an anagram indicator (foreign order of the letters).
'returning' shows that the letters should be reversed in order.
'overseas' becomes 'os' (abbreviation).
'os' in reverse letter order is 'so'.
'tour' anagrammed gives 'rtuo'.
'vi'+'rtuo'+'so'='VIRTUOSO'
Can you help me to learn more?
(Other definitions for virtuoso that I've seen before include "Musician of the highest technical skill" , "Maven" , "Highly skilled performer" , "Person who excels in technique, as in playing musical instrument" , "Genius" .)