| Undergarment specification | 26 |
| Undergarment material | 21 |
| Undergarment fitting device? | 28 |
| Undergarment | 12 |
| Underfunded | 11 |
| Underfootings for dignitaries | 29 |
| Underfooting for Fleming | 24 |
| Underfoot? | 10 |
| Underfoot item | 14 |
| Underfolded edge | 16 |
| Underfeed, perhaps | 18 |
| Underfed, maybe | 15 |
| Underestimates | 14 |
| Underestimated album component | 30 |
| Underestimated | 14 |
| Underestimate, e.g. | 19 |
| Underestimate | 13 |
| Underemphasize | 14 |
| Underdress | 10 |
| Underdone | 9 |
| Underdogs' victories | 24 |
| Underdogs may beat them | 23 |
| Underdog, often | 15 |
| Underdog's win, e.g. | 24 |
| Underdog's win | 18 |
| Underdog's victory | 22 |
| Underdog's thrill | 21 |
| Underdog's saying | 21 |
| Underdog's motivation (Part 3) | 34 |
| Underdog's motivation (Part 2) | 34 |
| Underdog's motivation (Part 1) | 34 |
| Underdog's hope | 19 |
| Underdog's goals | 20 |
| Underdog's goal | 19 |
| Underdog's fastener? | 24 |
| Underdog's diet? | 20 |
| Underdog's coup | 19 |
| Underdog's achievement | 26 |
| Underdog with a chance | 22 |
| Underdog winner over T.E.D. | 27 |
| Underdog victory | 16 |
| Underdog victories | 18 |
| Underdog supporter | 18 |
| Underdog playoffs participant | 29 |
| Underdog in a certain ring | 26 |
| Underdeveloped ones | 19 |
| Underdeveloped nations | 22 |
| Underdeveloped countries | 24 |
| Undercut | 8 |
| Undercroft | 10 |
| Undercover? | 11 |
| Undercover, informally | 22 |
| Undercover, for short | 21 |
| Undercover, briefly | 19 |
| Undercover worker, perhaps | 26 |
| Undercover worker | 17 |
| Undercover wear? | 16 |
| Undercover types | 16 |
| Undercover type | 15 |
| Undercover time? | 16 |
| Undercover surveillance vehicle, perhaps | 40 |
| Undercover sort | 15 |
| Undercover police operation | 27 |
| Undercover Playboy bunny of 1963 | 32 |
| Undercover person | 17 |
| Undercover outfit? | 18 |
| Undercover org. | 15 |
| Undercover operator | 19 |
| Undercover operative | 20 |
| Undercover operations where agents can bring guests? | 52 |
| Undercover operations | 21 |
| Undercover operation to trap a letter? | 38 |
| Undercover operation | 20 |
| Undercover op | 13 |
| Undercover officer's shout, upon revealing him or herself | 61 |
| Undercover men | 14 |
| Undercover man | 14 |
| Undercover jobs | 15 |
| Undercover item? | 16 |
| Undercover item | 15 |
| Undercover group: Abbr. | 23 |
| Undercover enterprise | 21 |
| Undercover drug agents | 22 |
| Undercover drug agent | 21 |
| Undercover device | 17 |
| Undercover cops | 15 |
| Undercover cop? | 15 |
| Undercover cop, perhaps | 23 |
| Undercover cop, maybe | 21 |
| Undercover cop, at times | 24 |
| Undercover cop of 1970s TV | 26 |
| Undercover cop | 14 |
| Undercover buster | 17 |
| Undercover apparatus | 20 |
| Undercover agt. | 15 |
| Undercover agents | 17 |
| Undercover agent? | 17 |
| Undercover agent, in slang | 26 |
| Undercover agent's wear | 27 |
| Undercover agent's cover? | 29 |