| Sing along silently | 19 |
| Sing along | 10 |
| Sing alone | 10 |
| Sing again, as for a show finale | 32 |
| Sing across the Alps | 20 |
| Sing a siren's song | 23 |
| Sing a simple song | 18 |
| Sing a scale | 12 |
| Sing a paean to | 15 |
| Sing a lullaby, say | 19 |
| Sing a love song to | 19 |
| Sing a love song | 16 |
| Sing a different tune | 21 |
| Sing a ballad | 13 |
| Sing -- (vocalize alone) | 24 |
| Sing -- (perform an aria, e.g.) | 31 |
| Sing -- (croon by oneself) | 26 |
| Sing -- (croon alone) | 21 |
| Sing "The Moon Got in My Eyes," e.g. | 46 |
| Sing "The Lonely Goatherd," say | 41 |
| Sing "shooby-doo" | 27 |
| Sing "nyah-nyah" to | 29 |
| Sing "K-K-K-Katy," say | 32 |
| Sing "It Don't Mean a Thing (If It Ain't Got That Swing)," say | 80 |
| Sing "Gladly the cross-eyed bear," say | 48 |
| Sing "Bye Bye Birdie," e.g. | 37 |
| Sing & ___ Ernie ("Sesame Street" doll) | 53 |
| Sing ''shooby-doo,'' e.g. | 41 |
| Sing ''nyah-nyah'' to | 37 |
| Sing | 4 |
| Sinfulness | 10 |
| Sinful; sinister | 16 |
| Sinful utterance | 16 |
| Sinful man | 10 |
| Sinful habits | 13 |
| Sinful habit | 12 |
| Sinful emotion | 14 |
| Sinful city of Scripture | 24 |
| Sinful city | 11 |
| Sinful action | 13 |
| Sinful | 6 |
| Sinewy swimmers | 15 |
| Sinewy creatures | 16 |
| Sinewy and lean | 15 |
| Sinewy | 6 |
| Sinews | 6 |
| Sinew: Prefix | 13 |
| Sinew: Comb. form | 17 |
| Sinew | 5 |
| Sines, e.g. | 11 |
| Sines and cosines | 17 |
| Sinenon | 7 |
| Sinecures for ward heelers | 26 |
| Sinecures | 9 |
| Sinecure | 8 |
| Sine–non connection | 26 |
| Sinead O'Connor "The ___ and the Cobra" | 53 |
| Sine/non insert | 15 |
| Sine-non link | 13 |
| Sine-non connector | 18 |
| Sine, for one | 13 |
| Sine, e.g. | 10 |
| Sine, cosine, or tangent | 24 |
| Sine, cosine or tangent | 23 |
| Sine, cosine and tangent | 24 |
| Sine's reciprocal: Abbr. | 28 |
| Sine's reciprocal, in trig: abbr. | 37 |
| Sine's reciprocal, in trig. | 31 |
| Sine's reciprocal, in trig | 30 |
| Sine's reciprocal, briefly | 30 |
| Sine's reciprocal | 21 |
| Sine _____ non | 14 |
| Sine ____ non | 13 |
| Sine ___ non (essential thing) | 30 |
| Sine ___ non | 12 |
| Sine ___ (timeless): Lat. | 25 |
| Sine ___ (indefinitely) | 23 |
| Sine ___ | 8 |
| Sine __ non: essential | 22 |
| Sine __ non | 11 |
| Sine study, for short | 21 |
| Sine qua ____ | 13 |
| Sine qua ___ (necessity) | 24 |
| Sine qua ___ (essential things) | 31 |
| Sine qua ___ | 12 |
| Sine qua __ | 11 |
| Sine qua nons | 13 |
| Sine qua non when up the creek | 30 |
| Sine qua non for certain duets | 30 |
| Sine qua non for an athlete | 27 |
| Sine qua non at an afternoon affair | 35 |
| Sine qua non e.g. | 18 |
| Sine qua non | 12 |
| Sine qua -- | 11 |
| Sine or tangent, e.g. | 21 |
| Sine or secant | 14 |
| Sine or cosine, say | 19 |
| Sine or cosine, e.g. | 20 |
| Sine or cosine | 14 |
| Sine of 30° | 14 |