| Industrial suburb of Detroit | 28 |
| Industrial town on the Oise | 27 |
| Industrial units: Abbr. | 23 |
| Industrial-strength air? | 24 |
| Industrial-strength cleaner | 27 |
| Industrial-strength cleaners | 28 |
| Industrial-strength relief? | 27 |
| Industrial-zone feature | 23 |
| Industrialist Cyrus ___ | 23 |
| Industrialist Guggenheim | 24 |
| Industrialist J. Paul ___ | 25 |
| Industrialist Schindler | 23 |
| Industrialist Stronach | 22 |
| Industrialist von Skoda | 23 |
| Industrialist's deg. | 24 |
| Industrialists of a sort | 24 |
| Industrialists' org. | 24 |
| Industrious carpenter, e.g. | 27 |
| Industrious Japanese city | 25 |
| Industrious little creatures | 28 |
| Industrious little worker | 25 |
| Industrious six-footers | 23 |
| Industrious six-footers? | 24 |
| Industrious tunnel-makers | 25 |
| Industry begun in 1895 | 22 |
| Industry org. Plummer served | 28 |
| Indwelling power or spirit | 26 |
| Indy 500 champ Luyendyk | 23 |
| Indy 500 engine supplements | 27 |
| Indy 500 entrant's skill | 28 |
| Indy 500 racer Luyendyk | 23 |
| Indy 500 winner Franchitti | 26 |
| Indy 500 winner Luyendyk | 24 |
| Indy 500's Luyendyk | 23 |
| Indy and Daytona 500 winner | 27 |
| Indy driver's concern | 25 |
| Indy Jones' bugaboo | 23 |
| Indy Pro Series champ in 2002 | 29 |
| Indy quick-change artists | 25 |
| Indy sights since 1911 | 22 |
| Indy winner after Emerson | 25 |
| Indy winner Franchitti | 22 |
| Indy's "500" | 26 |
| Indy's track, for one | 25 |
| Indy-winning Al, Jr. or Sr. | 27 |
| IndyCar driver Patrick | 22 |
| Inebriated vege-taters? | 23 |
| Inedible doughnut part? | 23 |
| Inedible kind of orange | 23 |
| Inedible Swiss cheese part? | 27 |
| Ineffective firecracker | 23 |
| Ineffective fly catchers? | 25 |
| Ineffective protagonist | 23 |
| Ineffective, as a threat | 24 |
| Ineffectual competitor | 22 |
| Ineffectual one, slangily | 25 |
| Inelegant fix for a glitch | 26 |
| Inelegant laughing sound | 24 |
| Inelegant restaurant sign | 25 |
| Ineligible for a dunce cap | 26 |
| Ineligible for benefits, say | 28 |
| Inept climber's need | 24 |
| Inept Copenhagen troupe? | 24 |
| Inept fictional underling | 25 |
| Inept photographer's snap | 29 |
| Inert element used in lights | 28 |
| Inert gas in vacuum tubes | 25 |
| Inert gas used in welding | 25 |
| Inessential internal organ | 26 |
| Inevitable destruction | 22 |
| Inevitable fact of life? | 24 |
| Inexact figures, briefly | 24 |
| Inexact recipe amounts | 22 |
| Inexact, as a translation | 25 |
| Inexpensive ballpoints | 22 |
| Inexpensive cigar (Var.) | 24 |
| Inexpensive confection | 22 |
| Inexpensive entertainment | 25 |
| Inexpensive game with cards? | 28 |
| Inexpensive home protector | 26 |
| Inexpensive investment option | 29 |
| Inexpensive kids' toy | 25 |
| Inexpensive pens and lighters | 29 |
| Inexpensive place to stay | 25 |
| Inexpensive pro shop buys | 25 |
| Inexpensive reprint, maybe | 26 |
| Inexpensive restaurant | 22 |
| Inexpensive roofing material | 28 |
| Inexpensive sweets of old | 25 |
| Inexpensive swing, perhaps | 26 |
| Inexpensive telegram, once | 26 |
| Inexpensive treats of yore | 26 |
| Inexpensive way to travel | 25 |
| Inexpensive wine choice | 23 |
| Inexpensive, in product names | 29 |
| Inexperienced beginners | 23 |
| Inexperienced company leader? | 29 |
| Inexperienced golfers? | 22 |
| Inexperienced manager? | 22 |
| Inexperienced mind, e.g. | 24 |