Violetta's first aria to be rewritten for pilot (7)
I believe the answer is:
aviator
'for pilot' is the definition.
(I've seen this before)
'violetta's first aria to be rewritten' is the wordplay.
'violetta's first' becomes 'v' (1st letter of 'violetta').
'be rewritten' indicates anagramming the letters (I've seen 'being rewritten' mean this).
'v'+'aria'+'to'='variato'
'variato' with letters rearranged gives 'AVIATOR'.
(Other definitions for aviator that I've seen before include "Aeronaut" , "Aircraft pilot" , "one in a crate?" , "One flying aircraft" , "Flyer, pilot" .)