| Of a revolutionary theory about revolutions | 43 |
| Of a series of ecological communities | 37 |
| Of a study of animal and human behavior | 39 |
| Of a type of heavenly intersection | 34 |
| Of a woman's marriage portion | 33 |
| Of an ancient division of Palestine | 35 |
| Of an astronaut's environment | 33 |
| Of an element important in electricity | 38 |
| Of astrological "houses" | 34 |
| Of atoms' spatial relationships | 35 |
| Of exceptional quality, Southern-style | 38 |
| Of form, as opposed to substance | 32 |
| Of fraternities and sororities collectively | 43 |
| Of French rock music in the 60's | 36 |
| Of greatest interest to a bibliophile, maybe | 44 |
| Of interest to talk-show producers | 34 |
| Of Mubarak's land: Comb. form | 34 |
| Of particular interest to a completist | 38 |
| Of San Juan's island: Puerto ____ | 37 |
| Of Shakespeare's time: Abbr. | 32 |
| Of some mother-son relationships | 32 |
| Of songbirds (anagram of SO NICE) | 33 |
| Of the "Russian Riviera" | 34 |
| Of the 48 states, it has the largest island | 43 |
| Of the author of "Candida" | 36 |
| Of the base of the vertebral column | 35 |
| Of the french verb "to be" | 36 |
| Of the highest quality, informally | 34 |
| Of the highest quality, slangily | 32 |
| Of the line on which an object rotates | 38 |
| Of the line on which Earth turns | 32 |
| Of the philosophical study of knowledge | 39 |
| Of the science of data transmission | 35 |
| Of the shallow-water region on a seacoast | 41 |
| Of the spacing of atoms in a molecule | 37 |
| Of the stages in an ecological succession | 41 |
| Of the third syllable from the end | 34 |
| Of the universe in its present state | 36 |
| Of the vascular layer of the eye | 32 |
| Of the Western Hemisphere, basically | 36 |
| Of the world's heaviest metal | 33 |
| Of the writer of "Divina Commedia" | 44 |
| Of visual images retained in memory | 35 |
| Of which A-Ant was pub. in Jan. 1884 | 36 |
| Off and on (and the key to unlocking this puzzle) | 49 |
| Off the rear, nautically speaking | 33 |
| Off With Their Heads "Hard to ___" | 44 |
| Off-Broadway's "Silence of ___" | 45 |
| Off-Broadway's "___ Baltimore" | 44 |
| Off-color Coburn/Tandy film 1946? | 34 |
| Off-color, like comedic material | 32 |
| Off-key 1990 Julia Roberts movie? | 33 |
| Off-key turn that almost comes back on itself? | 46 |
| Off-road vehicle gearshift problem? | 35 |
| Off-roader's purchase, for short | 36 |
| Off-roaders' choices, briefly | 33 |
| Off-roaders' rides, for short | 33 |
| Off-season in the Alps, probably | 32 |
| Off-___ (place for mountain bikes) | 34 |
| Off. who wears a silver oak leaf | 32 |
| Offbeat comedienne oddly spelled | 33 |
| Offbeat handwriting that's hard to make out? | 48 |
| Offenbach's "La Belle ___" | 40 |
| Offenbach's "Tales of ---" | 40 |
| Offenbach's "The ___ Hoffmann" | 44 |
| Offenbach's "___ Parisienne" | 42 |
| Offending soldier's expulsion | 33 |
| Offense committed behind the wheel | 34 |
| Offense involving a little pinch | 32 |
| Offense of giving obsessive attention to ferns? | 47 |
| Offense of passing off fake low-lying areas? | 44 |
| Offense of selling narcotic texts? | 34 |
| Offense of shoving someone with a six-pack? | 43 |
| Offense that may earn you points: Abbr. | 39 |
| Offense that might result in a revoked lic. | 43 |
| Offense that's provoked by lurid news | 41 |
| Offensive actions on the baseball diamond | 41 |
| Offensive famously photographed by Robert Capa | 46 |
| Offensive name in multiple contexts | 35 |
| Offensive player farthest from the QB | 37 |
| Offensive, as an amount of money | 32 |
| Offer a doughnut to a dieter, say | 33 |
| Offer a less-than-flattering review of | 38 |
| Offer a new construction estimate | 33 |
| Offer a Thanksgiving Day highlight | 34 |
| Offer advice from around a card table | 37 |
| Offer an opinion without being asked | 36 |
| Offer chocolates to, as a dieter | 32 |
| Offer for an R. J. Reynolds brand? | 34 |
| Offer from a desperate sort, perhaps | 36 |
| Offer in response to "Shake!" | 39 |
| Offer on a "Wanted" poster | 36 |
| Offer on the golfing section of Craigslist? | 43 |
| Offer one's services for a fee | 34 |
| Offer some sugar lumps to a Triple Crown winner? | 48 |
| Offer that seems too good to be true, probably | 46 |
| Offer that's too good to be true, often | 43 |
| Offer to buy unspecified stocks, say | 36 |
| Offer to one who's been recently blessed? | 45 |
| Offer to shake, between big cats? | 33 |