| On-the-way-out PC component | 27 |
| Obsolescent PC monitor type | 27 |
| One place to view the House | 27 |
| One waited for in the wings | 27 |
| One holding a card, perhaps | 27 |
| One or two game implements? | 27 |
| One reason for slowing down | 27 |
| Ol' Blue Eyes, to Nancy | 27 |
| Old terr. west of Minnesota | 27 |
| One who might wear slippers | 27 |
| One inspired by Terpsichore | 27 |
| Operation Overlord monogram | 27 |
| Onetime Presidential inits. | 27 |
| One with drill skill: Abbr. | 27 |
| Org. that catches smugglers | 27 |
| Org. in "Traffic" | 27 |
| Ordained Catholic clergyman | 27 |
| One with a choice, in poker | 27 |
| One who makes an admission? | 27 |
| One in Frank's Rat Pack | 27 |
| Orange-handled pot beverage | 27 |
| One of Daddy's triplets | 27 |
| Ownership card, in Monopoly | 27 |
| One thing a dictionary does | 27 |
| Old White House middle name | 27 |
| One way to kill characters? | 27 |
| One to the left on the Hill | 27 |
| Oscar-nominated actor Bruce | 27 |
| One with an ancestor: Abbr. | 27 |
| One taking the lead?: Abbr. | 27 |
| One of a semana's seven | 27 |
| Old-fashioned phone feature | 27 |
| One method to drum up sales | 27 |
| Opinion sharer's remark | 27 |
| One who hits the high notes | 27 |
| Onetime native of Mauritius | 27 |
| One looking for a few bucks | 27 |
| One going for the big bucks | 27 |
| Outburst from Homer Simpson | 27 |
| One-time Clinton challenger | 27 |
| Onetime Robert De Niro role | 27 |
| One of Walt's creations | 27 |
| On the back burner, perhaps | 27 |
| One of a box of 13, perhaps | 27 |
| Opportunity, metaphorically | 27 |
| One of Doc's companions | 27 |
| Only beardless Disney dwarf | 27 |
| One of three in an ellipsis | 27 |
| One bad thing after another | 27 |
| One-eighth of a fluid ounce | 27 |
| O'Neill's specialty | 27 |
| One moving earth underwater | 27 |
| Oenophile's superlative | 27 |
| Ophthalmologist's order | 27 |
| One who gets a lot of booze | 27 |
| One way to settle a dispute | 27 |
| Ones holding hands, usually | 27 |
| One titled "Lord" | 27 |
| One bringing home the bacon | 27 |
| One who brings in the bucks | 27 |
| Opener of a Steinbeck title | 27 |
| Object of a springtime hunt | 27 |
| Onetime American competitor | 27 |
| One that hangs out at home? | 27 |
| Online auction payment, say | 27 |
| One cause of food poisoning | 27 |
| Onetime Leno announcer Hall | 27 |
| Old Norse poetry collection | 27 |
| Old Icelandic literary work | 27 |
| One of 30 on an icosahedron | 27 |
| One applied to a grindstone | 27 |
| O'Neill and O'Brien | 27 |
| Online university extension | 27 |
| Onetime overseas trade grp. | 27 |
| One making twists and turns | 27 |
| Opposite of morn, to a poet | 27 |
| Otherworldly in the extreme | 27 |
| Option for one's return | 27 |
| One way to submit your 1040 | 27 |
| Old "Oh my gosh!" | 27 |
| Old-school "OMG!" | 27 |
| Often-bruised item, perhaps | 27 |
| Once-popular feather source | 27 |
| Old MacDonald's refrain | 27 |
| One way to get to Jerusalem | 27 |
| One of Hamburg's rivers | 27 |
| Olden times, in olden times | 27 |
| One studying en français | 27 |
| Once across the Rio Grande? | 27 |
| One of the Manning brothers | 27 |
| Originator of Jellicle Cats | 27 |
| Orange-nosed Muppet monster | 27 |
| O'Neill locale for lust | 27 |
| Opt out of the local union? | 27 |
| One who skips church, maybe | 27 |
| One forming a secret union? | 27 |
| Orphaned lion of literature | 27 |
| Old-time actress Lanchester | 27 |
| Old comic actress ___ Janis | 27 |
| Often-filtered transmission | 27 |