| 40's arena, for short | 25 |
| 40's boxer Tony | 19 |
| 40's fad | 12 |
| 40's foe | 12 |
| 40's jazz-style singer Ella Mae | 35 |
| 40's singing brother Ray or Bob | 35 |
| 40's theater director James | 31 |
| 40's turning point | 22 |
| 40's war agcy. | 18 |
| 40's White House name | 25 |
| 40's-50's comedy team member | 36 |
| 40's-50's Dodger great | 30 |
| 40's-50's music | 23 |
| 40's-50's TV drama sponsor | 34 |
| 40's-50's world pool champ Willie | 41 |
| 40's-50's Yankees All-Star pitcher Reynolds | 51 |
| 40's-60's leader overthrown by Ne Win | 45 |
| 40+-country region | 18 |
| 40, 60, 75 or 100, commonly | 27 |
| 40, to 10 and 8: Abbr. | 22 |
| 40,468,564 28/125 square centimeters | 36 |
| 40-30, score-wise | 17 |
| 40-40 in tennis | 15 |
| 40-40, in tennis | 16 |
| 40-Acr. bigwig | 14 |
| 40-card game | 12 |
| 40-day observance | 17 |
| 40-day period | 13 |
| 40-day period of penitence | 26 |
| 40-decibel unit | 15 |
| 40-hour-a-weeker | 16 |
| 40-person baseball team | 23 |
| 40-plus-year-old NBC soap, to fans | 34 |
| 40-point meld | 13 |
| 40-weekday observance | 21 |
| 40-weight throwaways | 20 |
| 400 list-maker | 14 |
| 400 meters to an Olympic runner, usually | 40 |
| 400 meters, in Olympic track and field | 38 |
| 400 meters, maybe | 17 |
| 400-meter participant | 21 |
| 400-pound calf, perhaps | 23 |
| 401 | 3 |
| 401(k) alternative | 18 |
| 401(k) alternative named for a Delaware sen. | 44 |
| 401(k) alternative, briefly | 27 |
| 401(k) alternative, for short | 29 |
| 401(k) alternative: Abbr. | 25 |
| 401(k) alternatives | 19 |
| 401(k) cousin | 13 |
| 401(k) cousin, briefly | 22 |
| 401(k) cousins | 14 |
| 401(k) employer matching contributions, e.g. | 44 |
| 401(k) expert, e.g. | 19 |
| 401(k) kin | 10 |
| 401(k) kin, briefly | 19 |
| 401(k) participant | 18 |
| 401(k) relative | 15 |
| 401(k) relatives | 16 |
| 401(k) spender, usually | 23 |
| 401(k) supplement | 17 |
| 401(k)'s kin | 16 |
| 401(k), e.g. | 12 |
| 401, at the Forum | 17 |
| 401, in old Rome | 16 |
| 401, in Roman times | 19 |
| 401, long ago | 13 |
| 401, to Marcus | 14 |
| 401, to Nero | 12 |
| 401, to the Romans | 18 |
| 401K earning | 12 |
| 402% of L | 9 |
| 402, in old Rome | 16 |
| 402, to Fabius | 14 |
| 403(b) cousin | 13 |
| 404 | 3 |
| 404 in old Rome | 15 |
| 404, in 404 | 11 |
| 404, in old Rome | 16 |
| 404, once | 9 |
| 404, to Caesar | 14 |
| 407 in Orlando, e.g. | 20 |
| 409 and 410, but not 411 | 24 |
| 40A/34D topping | 15 |
| 40¢ per fifth of a mile, in New York City? | 45 |
| 40th anniversary gift | 21 |
| 40th day after Easter | 21 |
| 40th president | 14 |
| 40th president of the U.S. | 26 |
| 40th president, informally | 26 |
| 40th st. | 8 |
| 40th U.S. president | 19 |
| 41 | 2 |
| 41's initials | 17 |
| 41, to Cato | 11 |
| 41, to Nero | 11 |
| 41-week best seller, 1970-71 | 28 |
| 410 or 212, e.g. | 16 |
| 410% of D | 9 |
| 411 | 3 |