| Underworld of myth | 18 |
| Underworld of Greek mythology | 29 |
| Underworld name | 15 |
| Underworld money lender | 23 |
| Underworld meeting place | 24 |
| Underworld leader? | 18 |
| Underworld leader | 17 |
| Underworld language | 19 |
| Underworld kingpin | 18 |
| Underworld higher-up | 20 |
| Underworld groups | 17 |
| Underworld group, with "the" | 38 |
| Underworld group | 16 |
| Underworld goddess | 18 |
| Underworld god | 14 |
| Underworld flower | 17 |
| Underworld figures? | 19 |
| Underworld figures may cross it | 31 |
| Underworld figures | 18 |
| Underworld figure | 17 |
| Underworld ferryman's post | 30 |
| Underworld family | 17 |
| Underworld entrance, to an Italian | 34 |
| Underworld denizens | 19 |
| Underworld deity | 16 |
| Underworld code of silence | 26 |
| Underworld bosses | 17 |
| Underworld boss? | 16 |
| Underworld boss | 15 |
| Underworld bigwig | 17 |
| Underworld actor? | 17 |
| Underworld activities | 21 |
| Underworld | 10 |
| Underwood received 24 | 21 |
| Underwood and Studdard, affectionately | 38 |
| Underwood | 9 |
| Underwire underwear | 19 |
| Underwire holder | 16 |
| Underwire garment | 17 |
| Underwhelmed grunt | 18 |
| Underwent remission of fever | 28 |
| Underwent reflection? | 21 |
| Underwent reduction | 19 |
| Underwent chemical change | 25 |
| Underwent a recession | 21 |
| Underwent | 9 |
| Underweight delivery, maybe | 27 |
| Underweight | 11 |
| Underwear, for short | 20 |
| Underwear with underwire | 24 |
| Underwear units | 15 |
| Underwear top | 13 |
| Underwear that never needs washing? | 35 |
| Underwear promoted by Michael Jordan | 36 |
| Underwear prank performed while someone takes a photograph? | 59 |
| Underwear of yore | 17 |
| Underwear material | 18 |
| Underwear logo | 14 |
| Underwear letters | 17 |
| Underwear initials | 18 |
| Underwear given for door prize? | 31 |
| Underwear for the unhinged? | 27 |
| Underwear for Elsie? | 20 |
| Underwear fabrics | 17 |
| Underwear fabric | 16 |
| Underwear choice | 16 |
| Underwear brand that recently ended their relationship with Charlie Sheen | 73 |
| Underwear brand | 15 |
| Underwear and socks inventory? | 30 |
| Underwear of yore | 18 |
| Underwear | 9 |
| Underway, to Sherlock Holmes | 28 |
| Underway, to Sherlock | 21 |
| Underway, to Holmes | 19 |
| Underway to over there? | 23 |
| Underway to over there | 22 |
| Underway | 8 |
| Underwater-tunnel digger | 24 |
| Underwater-torpedo inventor | 27 |
| Underwater-mine finder, e.g. | 28 |
| Underwater zappers | 18 |
| Underwater worker | 17 |
| Underwater wiggler | 18 |
| Underwater weapon | 17 |
| Underwater wave generator | 25 |
| Underwater vessels, for short | 29 |
| Underwater vessels | 18 |
| Underwater vessel, briefly | 26 |
| Underwater vessel | 17 |
| Underwater treasure | 19 |
| Underwater trap | 15 |
| Underwater transmission | 23 |
| Underwater test site | 20 |
| Underwater tank | 15 |
| Underwater swimmer | 18 |
| Underwater steering mechanisms | 30 |
| Underwater steerer | 18 |
| Underwater sport | 16 |
| Underwater speaker? | 19 |
| Underwater sound device | 23 |