There is a total of 85689 clues beginning with o
- One of the "Hair" writers
- One of the "hands" in the command "shake hands"
- One of the "harangue gang"
- One of the "Hartford Wits"
- One of the "Heigh-ho" septet
- One of the "Hoboken Four"
- One of the "holy trinity" ingredients in Cajun cuisine
- One of the "Honeymooners"
- One of the "Honeymooners" Kramdens
- One of the "ice giant" planets
- One of the "impossibles"
- One of the "Jalna" family
- One of the "k" sounds
- One of the "kingdoms"
- One of the "little people"
- One of the "little people"
- One of the "Little Rascals"
- One of the "Little Three"
- One of the "Little Women"
- One of the "Little Women"
- One of the "Long Gray Line"
- One of the "Long Tails"
- One of the "Love Train" singers
- One of the "M" boys of baseball
- One of the "M*A*S*H" cast
- One of the "Magnificent Seven"
- One of the "Monopoly" tokens
- One of the "nauts"
- One of the "Neutron Dance" group
- One of the "New7Wonders of the World," in Jordan
- One of the "north 40"
- One of the "north forty"
- One of the "ologies"
- One of the "P"s in ppg
- One of the "painted people" of early Britain
- One of the "Philippics”
- One of the "pickings" hidden in five puzzle answers
- One of the "probes"
- One of the "proud" items in a Murray book
- One of the "Public Ivies"
- One of the "Publishers of Cheap and Popular Pictures"
- One of the "Queens"
- One of the "ribbons"
- One of the "Ring" cycle
- One of the "Rivals"
- One of the "Rocky" films
- One of the "saisons"
- One of the "Sebastians"
- One of the "Seven Brides for Seven Brothers"
- One of the "Seven Dwarfs"
- One of the "Seven Sisters"
- One of the "Seven Sisters”
- One of the "Seven Wise Men of Greece"
- One of the "She's Gone" singers
- One of the "South Park" boys
- One of the "Star Trek” series, to fans
- One of the "Stooges"
- One of the "Tales of the South Pacific"
- One of the "Taxi" cabbies
- One of the "three B's"
- One of the "Three Bs"
- One of the "three faces of Eve"
- One of the "three little people" whose problems "don't amount to a hill of beans in this crazy world," in a classic film
- One of the "Three" at Yalta
- One of the "tools of ignorance"
- One of the "Twelve Angry Men"
- One of the "Twins" twins
- One of the "Two Virgins"
- One of the "Two Women"
- One of the "Untouchables"
- One of the "virgins" of "Two Virgins"
- One of the "Wannabe" singers
- One of the "wee hours"
- One of the "wee small" hours
- One of the "wonder" drugs
- One of the "worlds" of 53 Down
- One of the 'Brady Bunch' girls
- One of the 'Desperate Housewives'
- One of the 10 brightest stars
- One of the 10 lowest digits?
- One of the 10-Down birds in the world
- One of the 11 Down
- One of the 11 official languages of Canada's Northwest Territories
- One of the 11 official languages of South Africa
- One of the 12 in the Pac-12
- One of the 12 tribes
- One of the 12 tribes of Israel
- One of the 12 tributes in "The Hunger Games"
- One of the 124 chapters of the Koran
- One of the 13 colonies: Abbr
- One of the 13 orig colonies
- One of the 13: Abbr
- One of the 14 Holy Helpers
- One of the 17 Across
- One of the 1919 Big Four
- One of the 1960s Rams' Fearsome Foursome
- One of the 20 brightest stars
- One of the 20-Across
- One of the 2008 Olympic mascots
- One of the 26 Across