Start out of order, skipping setter — a maestro! (6)
I believe the answer is:
artist
'a maestro' is the definition.
(thesaurus)
'start out of order skipping setter' is the wordplay.
I cannot quite see how this works, but
'setter' could be 'i' (the person that set the crossword) and 'i' is found within the answer.
an anagram of 'start' is 'artst' which is located in the left over letters.
No letters remain.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for artist that I've seen before include "Expert" , "Constable, perhaps" , "One engaged in painting" , "Old learned man" , "Craftsman" .)