Soprano wrong to interrupt French king and composer (7)
I believe the answer is:
rossini
'composer' is the definition.
(Italian composer Gioachino Rossini)
'soprano wrong to interrupt french king' is the wordplay.
'soprano' becomes 's' (musical abbreviation).
'wrong' becomes 'sin' (wrong can mean a sin or crime).
'to interrupt' indicates putting letters inside.
'french king' becomes 'roi' ('king' in French).
's'+'sin'='ssin'
'ssin' put inside 'roi' is 'ROSSINI'.
'and' acts as a link.
(Other definitions for rossini that I've seen before include "Italian scorer" , "Italian composer, 1792-1868" , "Composer of The Thieving Magpie" , "Italian opera composer" , "Gioacchino ---, It. composer" .)