Six tours organised with opera's principal star performer (8)
I believe the answer is:
virtuoso
'star performer' is the definition.
'virtuoso' can be an answer for 'performer' (thesaurus). I am not sure about the 'star' bit.
'six tours organised with opera's principal' is the wordplay.
'six' becomes 'vi' ('vi' can be a synonym of 'six').
'organised with' is an anagram indicator.
'principal' says to take the initial letters.
The first letter of 'operas' is 'o'.
'tours' mixed up with 'o' can make 'rtuoso'.
'vi'+'rtuoso'='VIRTUOSO'
Can you help me to learn more?
(Other definitions for virtuoso that I've seen before include "musical star" , "Person who excels in techniques of singing or playing music" , "Person who excels in technique, as in playing musical instrument" , "Musician who's dazzlingly skilled" , "Maven" .)