Problem with above Crossword

[gardenknowin]

Can anyone out there in the realms of cruciverbalists, solve 32D " In music, an alternative passage which may be played instead of the original passage" {5}
I have O?S?A, but can't find anything to fit. Help please!

[glasman]

Ossia

[boxtops]

Your heading is confusing, which "above crossword"? - you didn't say!

[dannyk13]

Ossia

[factor-fiction]

I think tgardenknowin may have tried to use the title builder but the info didn't come through.

[gardenknowin]

Thank you all

[Baldric]

Just as well a couple of people have seen the clue, 'cause the question isn't very helpful!

[glasman]

??????

[Baldric]

;o)