| Undercover agent of a sort | 26 |
| Undercover agent | 16 |
| Undercover agcy. | 16 |
| Undercover activity? | 20 |
| Undercover | 10 |
| Undercooked, to some | 20 |
| Undercooked, perhaps | 20 |
| Undercooked, as eggs | 20 |
| Undercooked, as an egg | 22 |
| Undercooked meat danger | 23 |
| Undercooked | 11 |
| Underconfident utterances | 25 |
| Undercolored | 12 |
| Undercoats of paint | 19 |
| Undercoats a surface | 20 |
| Undercoating | 12 |
| Undercoat material | 18 |
| Undercoat for painting on wood | 30 |
| Undercoat applications | 22 |
| Undercoat | 9 |
| Underclothing | 13 |
| Underclassmen | 13 |
| Underclassman? | 14 |
| Undercarriage piece | 19 |
| Undercarriage parts | 19 |
| Undercarriage item | 18 |
| Undercard fight, for short | 26 |
| Undercard boxing bout | 21 |
| Underbrush cutter | 17 |
| Underbosses' bosses | 23 |
| Underboss | 9 |
| Underbodice | 11 |
| Underattended, say | 18 |
| Underarm product | 16 |
| Underarm | 8 |
| Underappreciated laborer | 24 |
| Underaged digger? | 17 |
| Underage temptation, slangily | 29 |
| Underage person | 15 |
| Underage one | 12 |
| Underage drinker's item | 27 |
| Underage drinker in Lincoln? | 28 |
| Underage child of a military officer? | 37 |
| Underage | 8 |
| Underachievers are not up to it | 31 |
| Underachiever's motto? | 26 |
| Under: Prefix | 13 |
| Under-water detection aid | 25 |
| Under-the-wire | 14 |
| Under-the-window routine | 24 |
| Under-the-window performance | 28 |
| Under-the-weather-looking | 25 |
| Under-the-tree items | 20 |
| Under-the-table things | 22 |
| Under-the-table term | 20 |
| Under-the-table promotion | 25 |
| Under-the-table payments | 24 |
| Under-the-table payment | 23 |
| Under-the-table money | 21 |
| Under-the-table item | 20 |
| Under-the-table flirtation | 26 |
| Under-the-table diversion | 25 |
| Under-the-table deal | 20 |
| Under-the-table activity | 24 |
| Under-the-table action | 22 |
| Under-the-table | 15 |
| Under-the-sink scourers | 23 |
| Under-the-sink joints | 21 |
| Under-the-sink items | 20 |
| Under-the-sink item | 19 |
| Under-the-sink installation | 27 |
| Under-the-sink cleaners | 23 |
| Under-the-sink brand | 20 |
| Under-the-hood knock source, perhaps | 36 |
| Under-the-hood cleaner | 22 |
| Under-the-gun spot | 18 |
| Under-the-gun situations | 24 |
| Under-the-cushions find | 23 |
| Under-the-counter ne'er-do-wells? | 37 |
| Under-the-chin helmet securer | 29 |
| Under-the-bridge folklore villain | 33 |
| Under-the-bed hider | 19 |
| Under-the-bed clump | 19 |
| Under-the-abdomen area | 22 |
| Under-one's-breath sound | 28 |
| Under-mine | 10 |
| Under-eye woes | 14 |
| Under-eave buzzers | 18 |
| Under-cutter? | 13 |
| Under-cover duds? | 17 |
| Under-body problem | 18 |
| Under-21 request, sometimes | 27 |
| Under, to Umberto | 17 |
| Under, to seamen | 16 |
| Under, to poets | 15 |
| Under, to Keats | 15 |
| Under, to Frost | 15 |
| Under, to Byron | 15 |
| Under, to Bryant | 16 |
| Under, to bards | 15 |