
1) One-act opera 2) Opera based on play 3) Opera by Pietro Mascagni
Found on
https://www.crosswordclues.com/clue/zanetto

Zanetto is an opera in one act by Pietro Mascagni to an Italian libretto by Giovanni Targioni-Tozzetti and Guido Menasci. It received its first performance on 2 March 1896 at the Liceo Musicale Rossini in Pesaro. Only 40 minutes long and with cast of two singers, Zanetto was originally described by its composer as a scena lirica (lyric scene) rath...
Found on
http://en.wikipedia.org/wiki/Zanetto
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