| UK multi-volume ref. work | 25 |
| UK king before George V | 23 |
| UK guitarist/singer Kate | 24 |
| Uintah Reservation Indians | 26 |
| Uinta Mountains' state | 26 |
| Uhlans' weapons: Abbr. | 26 |
| Uh-Oh! ___ (Nabisco product) | 28 |
| Ugly, terrifying woman | 22 |
| Ugly piece of furniture | 23 |
| Ugly duckling, ultimately | 25 |
| Ugly duckling, in time | 22 |
| Ugly Duckling, in reality | 25 |
| Ugly Duckling, eventually | 25 |
| Ugly Duckling, actually | 23 |
| Ugly American, in Acapulco | 26 |
| Ugandan tyrant Idi ___ | 22 |
| Ugandan president Amin | 22 |
| Ugandan hostage-rescue site | 27 |
| Ugandan city on Lake Victoria | 29 |
| Uganda's second P.M. | 24 |
| Uganda's president | 22 |
| Uganda's largest city | 25 |
| Ufologist's concerns | 24 |
| Ufologist's concern | 23 |
| UFO-centric book genre | 22 |
| UFO, in old sci-fi films | 24 |
| UFO's shape, perhaps | 24 |
| UFO pilots, supposedly | 22 |
| UFO pilots, presumably | 22 |
| UFO pilots, ostensibly | 22 |
| UFO occupants, perhaps | 22 |
| UFO navigators, so they say | 27 |
| UFO fliers, supposedly | 22 |
| UFO drivers, ostensibly | 23 |
| Uffizi Gallery treasures | 24 |
| Uffizi Gallery hanging | 22 |
| Uffizi Gallery attraction | 25 |
| UFC bout ender, at times | 24 |
| UEFA Euro 2004 champion | 23 |
| UCLA's conference, once | 27 |
| UC-Santa Barbara squad | 22 |
| Ubiquitous Yule bell-ringers | 28 |
| Ubiquitous refreshment | 22 |
| Ubiquitous puzzle plant | 23 |
| Ubiquitous puzzle birds | 23 |
| Ubiquitous puzzle bird | 22 |
| Ubiquitous prescription | 23 |
| Ubiquitous online initialism | 28 |
| Ubiquitous men's org. | 25 |
| Ubiquitous medicinal plant | 26 |
| Ubiquitous mall merchant | 24 |
| Ubiquitous Mad Magazine guy | 27 |
| Ubiquitous lily relative | 24 |
| Ubiquitous crossword cookie | 27 |
| Ubiquitous comestibles | 22 |
| Ubiquitous Celebes beast | 24 |
| Ubiquitous berry, nowadays | 26 |
| Ubiquitous auto features | 24 |
| Ubiquitous actor M. ___ Walsh | 29 |
| Ubiquitous 2003 single | 22 |
| UB40 "___ Ten" | 24 |
| UB40 "Two in ___" | 27 |
| UAL's westernmost hub | 25 |
| U2's lead vocalist | 22 |
| U2's land, to its natives | 29 |
| U2's Bono, since 2007 | 25 |
| U2 song and Bob Dylan album? | 28 |
| U2 singer's journey? | 24 |
| U2 bassist, familiarly | 22 |
| U2 "___ Your Boots" | 29 |
| U2 "___ of Harlem" | 28 |
| U2 "White as ___" | 27 |
| U2 "The Joshua ___" | 29 |
| U2 "Spanish ___" | 26 |
| U2 "Pop" single | 25 |
| U2 "One ___ Hill" | 27 |
| U2 "Bass ___" | 23 |
| U2 "All I Want ___" | 29 |
| U.S.T.A. singles champ: 1972 | 28 |
| U.S.T.A. champ in 1968 | 22 |
| U.S.S.R.-China river boundary | 29 |
| U.S.S.R.-China border river | 27 |
| U.S.S.R., to Muscovites | 23 |
| U.S.S.R.'s ___ Sea | 22 |
| U.S.S.R.'s ___ Mountains | 28 |
| U.S.S.R.'s successor | 24 |
| U.S.S.R.'s Sea of ___ | 25 |
| U.S.S.R.'s location | 23 |
| U.S.S.R.'s Brezhnev | 23 |
| U.S.S.R.'s Big Ivan, e.g. | 29 |
| U.S.S.R. water barrier | 22 |
| U.S.S.R. security police | 24 |
| U.S.S.R. security group | 23 |
| U.S.S.R. mountain range | 23 |
| U.S.S.R. monetary unit | 22 |
| U.S.S.R. mining center | 22 |
| U.S.S.R. member: Abbr. | 22 |
| U.S.S.R. livestock market | 25 |
| U.S.S.R. inland body of water | 29 |
| U.S.S.R. head: 1917-24 | 22 |