There is a total of 85689 clues beginning with o
- One of Christopher Robin's afflictions
- One of Christopher's three
- One of Chuck Noll's men
- One of Churchill's daughters
- One of Churchill's four offerings
- One of Churchill's leisure roles
- One of Churchill's middle names
- One of Churchill's names
- One of Churchill's pastimes
- One of Churchill's quartet
- One of Churchill's right hand men, Lord ___
- One of Churchill's right-hand men
- One of Churchill's specifications
- One of Churchill's three
- One of Cinderella's siblings
- One of Cinderella's step-sisters
- One of Cinderella's taunters
- One of Cindy, Jan, and Marsha's stepbrothers
- One of cinq in "Tartuffe"
- One of Circe's pair
- One of Circe's two
- One of Clark's roles
- One of classic TV's Huxtables
- One of classical music's "Three B's"
- One of classical music's Three B's
- One of classical music's Three Bs
- One of Cleo's maids
- One of Cleo's serving maids
- One of Cleo's wooers
- One of Cleopatra's attendants
- One of Cleopatra's charms
- One of Cleopatra's maids
- One of Clinton's old offices
- One of Clinton's titles
- One of clubs?
- One of CNN's Ns
- One of Cokie's pals
- One of Colette's novels
- One of Columbus' caravels
- One of Columbus' craft
- One of Columbus' crafts
- One of Columbus' fleet
- One of Columbus' ships
- One of Columbus' ships
- One of Columbus' three
- One of Columbus' three ships
- One of Columbus' three
- One of Columbus' trio
- One of Columbus' vessels
- One of Columbus' vessels
- One of Columbus's caravels
- One of Columbus's fleet
- One of Columbus's ships
- One of Columbus's three
- One of Columbus's three ships
- One of Columbus's vessels
- One of Columbus ships
- One of comparable street reputation?
- One of composer John Williams' five
- One of Congress's 435: Abbr
- One of Connie Mack's stars
- One of Cook islands
- One of Cooperstown's "First Class"
- One of Cooperstown's inaugural class
- One of Cordelia's sisters
- One of Corleone's capos
- One of Cornwallis' men
- One of Cortés's victims
- One of Cosby's TV kids
- One of Costner's costars in "Mr Brooks"
- One of Cotton-tail's siblings
- One of Count Dracula's forms
- One of Crackle's colleagues
- One of Crayola's hundreds
- One of Cristoforo Colombo's three
- One of Crosby's favorites
- One of Cuba's Castros
- One of Cuba’s Castros
- One of Cugat's specialties
- One of cummings' e's
- One of Cupid's can bring love
- One of Curly's brothers
- One of Curly's pals
- One of Cybill Shepherd's offspring
- One of D'Artagnan's fortes
- One of D'Artagnan's friends
- One of DDE's titles
- One of da Vinci's interests
- One of da Vinci's twelve
- One of Dada's daddies?
- One of Dada's fathers
- One of Daddy's triplets
- One of Daedalus' inventions
- One of Daisy Duck's nieces
- One of Dancer's partners
- One of Daniel Boone's vocations
- One of Darrow's clients
- One of Darwin's "imps of darkness"
- One of Darwin's fields
- One of dated ideology (with "old")