| Singing range of most women | 27 |
| Singing sensation Boyle | 23 |
| Singing sibs of the '70s | 28 |
| Singing style of the '50s | 29 |
| Singing style of the 1950s | 26 |
| Singing the praises of | 22 |
| Singing voice, in slang | 23 |
| Singing voice, informally | 25 |
| Singing voice, slangily | 23 |
| Singing voice, so to speak | 26 |
| Singing without backup | 22 |
| Singing without instruments | 27 |
| Singing-family surname | 22 |
| Single act, as of genius | 24 |
| Single aircraft mission | 23 |
| Single and double, e.g. | 23 |
| Single and lacking baggage | 26 |
| Single at the beginning? | 24 |
| Single bursts of firing | 23 |
| Single guy's place | 22 |
| Single malt scotch brand | 24 |
| Single malt, for instance | 25 |
| Single mom in a 2000s sitcom | 28 |
| Single NASA acceleration unit | 29 |
| Single occurrences, at Oxford | 29 |
| Single of the Week promoter | 27 |
| Single offs.' digs | 22 |
| Single one's last words? | 28 |
| Single or double, e.g. | 22 |
| Single or double, maybe | 23 |
| Single or double, often | 23 |
| Single or separated, e.g. | 25 |
| Single order of tutti frutti? | 29 |
| Single out as important | 23 |
| Single out for a closeup | 24 |
| Single part of the whole | 24 |
| Single past short, e.g. | 23 |
| Single piece for a dancer | 25 |
| Single piece of information | 27 |
| Single portion of food | 22 |
| Single result, perhaps | 22 |
| Single rotation period | 22 |
| Single season strike-out king | 29 |
| Single serving of butter | 24 |
| Single serving, like sugar | 26 |
| Single undivided entity | 23 |
| Single year's record | 24 |
| Single __: Olympics event | 25 |
| Single __: tournament type | 26 |
| Single's flip side, often | 29 |
| Single's greenery? | 22 |
| Single, double, or triple | 25 |
| Single, for one: Abbr. | 22 |
| Single, in Fenway Park | 22 |
| Single-and-looking group | 24 |
| Single-barreled weapons | 23 |
| Single-cell protozoans | 22 |
| Single-celled creature | 22 |
| Single-celled creatures | 23 |
| Single-celled critters | 22 |
| Single-celled critters (Var.) | 29 |
| Single-celled microorganism | 27 |
| Single-celled organism | 22 |
| Single-celled organism (Var.) | 29 |
| Single-celled organism: var. | 28 |
| Single-celled organisms | 23 |
| Single-celled protozoa | 22 |
| Single-celled protozoan | 23 |
| Single-cut and rat-tail? | 24 |
| Single-foot and others | 22 |
| Single-issue publication | 24 |
| Single-malt liquor store? | 25 |
| Single-masted sailboat | 22 |
| Single-masted sailing vessel | 28 |
| Single-minded theorizer | 23 |
| Single-named 1950s TV star | 26 |
| Single-named 60's singer | 28 |
| Single-named alt-rock artist | 28 |
| Single-named folk singer | 24 |
| Single-named folksinger | 23 |
| Single-named Irish singer | 25 |
| Single-named music star | 23 |
| Single-named New Age musician | 29 |
| Single-named New Age singer | 27 |
| Single-named nightclub star | 27 |
| Single-named supermodel | 23 |
| Single-pan meal of Valencia | 27 |
| Single-person, as a band | 24 |
| Single-principle believer | 25 |
| Single-principle philosopher | 28 |
| Single-reed instrument | 22 |
| Single-season home-run king | 27 |
| Single-serving coffee holder | 28 |
| Single-serving coffee option | 28 |
| Single-sex house, usually | 25 |
| Single-slab stone monuments | 27 |
| Single-speed bike feature | 25 |
| Single-strand molecule | 22 |
| Single-stranded molecule | 24 |
| Singled out as important | 24 |