| Clue | Source | Date |
|---|---|---|
| Male singers | The Guardian Quick | 30 Oct 2023 |
| Some deep voices | New York Times | 12 Oct 2020 |
| Male singers | Eugene Sheffer | 18 Dec 2017 |
| Rossini's William Tell and others | ||
| Singing voices in the 17-Across | ||
| Mariano Stabile et al. | ||
| Figaro and others | ||
| Male opera roles | ||
| Some choristers | ||
| Crooners, often | ||
| Opera cast members | ||
| Merrill and Milnes, e.g. | ||
| Merrill and Milnes | ||
| Singers. | ||
| London, Singher, Warren. | ||
| London and Singher. |