There is a total of 85689 clues beginning with o
- One of Stanky's pitchers
- One of Stars Hollow's Gilmores
- One of Stassen's jobs: Abbr
- One of Steinbeck's twins
- One of Stengel's "Amazin's"
- One of Stevenson's titles: Abbr
- One of Stonewall Jackson's men, for short
- One of Stonewall's soldiers
- One of Sublime's "40"
- One of Sudan's southern neighbors
- One of Suetonius' "Twelve Caesars"
- One of Sultan Qaboos bin Said's subjects
- One of Sunshine's fleet
- One of Superman's foes
- One of Superman's powers
- One of surrealism's founders
- One of Switzerland's Forest Cantons
- One of Switzerland's Four Forest Cantons
- One of Swoosie's co-stars on "Sisters"
- One of T E Lawrence's names
- One of T Speaker's 792, a career record
- One of Tallulah's hits
- One of Tarzan's "ropes"
- One of Tarzan's foes
- One of Taylor's eight
- One of Taylor's exes
- One of Taylor's exes—twice
- One of Taylor's husbands
- One of Taylor's students
- One of Ted Turner's networks
- One of Ted's networks
- One of teenage witch Sabrina's aunts
- One of ten
- One of ten digits
- One of ten in a Christmas song
- One of ten in a paper box
- One of ten in a strike
- One of ten in an alley
- One of ten in Baldwin's "Notes of a Native Son"
- One of ten in bowling
- One of ten in Exodus
- One of ten on a ten-speed
- One of ten satellites
- One of Tennessee's state symbols
- One of Tennessee's two state flowers
- One of Tennessee's twosomes
- One of tennis's Williams sisters
- One of tennis’s Williams sisters
- One of Terence's names
- One of Terpsichore's sisters
- One of Terry O'Reilly's players
- One of Texas' powerful elevens
- One of Thanos's foes in the Avengers movies
- One of the baseball leagues
- One of the "'round the world” Senators
- One of the "10 Attic orators"
- One of the "88"
- One of the "aholics"
- One of the "back 40"
- One of the "back forty"
- One of the "Barrack-Room Ballads"
- One of the "beats”
- One of the "Beverly Hills 90210" crowd
- One of the "Big Four" domestic carriers, once
- One of the "big four" music companies
- One of the "Big Four" record companies
- One of the "big four" record companies, before they became three
- One of the "big four" record labels
- One of the "Big Four" thrash metal bands
- One of the "Big Four"
- One of the "Big Ten"
- One of the "Big Three" at Yalta
- One of the "bowls"
- One of the "Boys from Syracuse"
- One of the "boys of summer"
- One of the "Brady Bunch" boys
- One of the "Brady Bunch" kids
- One of the "California Dreamin'" singers
- One of the "cardinal virtues"
- One of the "certain" things of this world
- One of the "certain" things, according to Ben Franklin
- One of the "classic" English horse races
- One of the "Cosby Show" kids
- One of the "Dancing House" architects
- One of the "deadly seven"
- One of the "Desperate Housewives"
- One of the "doves"
- One of the "dumbest dumb animals," according to 60-Across
- One of the "Elements of Style" authors
- One of the "Feds"
- One of the "Five Greatest"
- One of the "Forever and Ever" singing brothers
- One of the "four Cs" of diamonds
- One of the "Friends"
- One of the "Friends" friends
- One of the "Golden Girls" girls
- One of the "Great" five
- One of the "Great" ones
- One of the "great" waterways
- One of the "Greats"