Hi SB,
42a - 'Kiss From A Rose' was an international hit for the singer Seal.
To get to that answer you take the beginning letter/'originally' of S(ong) and E(ntitled), then, for the last A and L, you take 'A Rose' as being Axl Rose (the lead singer of Guns N' Roses) and take the Kiss from' with 'kiss' being X from his first name, giving you A(x)L.
In short, the whole clue definis the answer, but the wordplay to get to that is very clever because it utilises the name of a completely different pop/rock superstar.