There is a total of 85689 clues beginning with o
- Of a city near Florence
- Of a city of ancient Mesopotamia
- Of a city, for short
- Of a city
- Of a clan
- Of a clan emblem
- Of a clan symbol
- Of a clan
- Of a class of words
- Of a classical Greek order
- Of a classification of people
- Of a cleric
- Of a coal substance
- Of a coast
- Of a coin, "heads"
- Of a cold demeanor
- Of a college group
- Of a colony member
- Of a color scheme
- Of a complex
- Of a condition of imbalance
- Of a conductor
- Of a constellation
- Of a continent
- Of a continent
- Of a continent: Comb form
- Of a continent: Poet
- Of a continent: Prefix
- Of a contraction of the heart
- Of a contrapuntal work
- Of a Council of 1545–63
- Of a country: Abbr
- Of a country: Comb form
- Of a country: Prefix
- Of a country: Prefix
- Of a court sitting
- Of a court
- Of a cranial nerve
- Of a crown
- Of a cubitus
- Of a cultural group
- Of a cultural subgroup
- Of a culture
- Of a culture
- Of a cupola
- Of a Cyclades island
- Of a dark brown color
- Of a dark complexion
- Of a dark grayish blue
- Of a dark or black color
- Of a dark, volcanic rock
- Of a deanery
- Of a decade
- Of a decree
- Of a decree (anagram of 22 Across)
- Of a degree in rank
- Of a degree specified
- Of a delicate beauty
- Of a delta deposit
- Of a dentistry branch
- Of a desert
- Of a Devonian epoch
- Of a different kind
- Of a different nature
- Of a different sort
- Of a disciple
- Of a disease germ
- Of a distinctive group
- Of a district
- Of a dividing membrane
- Of a dividing wall
- Of a division
- Of a doctor's early training
- Of a doctrine
- Of a dowry
- Of a dowry
- Of a dull gray
- Of a durable wood
- Of a Eurasian chain
- Of a European country
- Of a European country: Abbr
- Of a European peninsula
- Of a European people: Comb form
- Of a fabled author
- Of a facial feature
- Of a family of men
- Of a famous fabulist
- Of a famous Greek hero
- Of a famous Latin poet
- Of a fast period
- Of a fast time
- Of a fasting time
- Of a father or mother
- Of a fatty acid
- Of a feather
- Of a feather, so to speak
- Of a fern spore
- Of a fertilizer chemical
- Of a fiber plant
- Of a financial plan