There is a total of 31390 clues beginning with on
- One of the Bufonidae
- One of the bunk beds
- One of the Bunker brothers (who were famous for their closeness)
- One of the Bunker twins
- One of the Bunkers
- One of the buoys
- One of the Burrs
- One of the Bush brothers
- One of the Bushes
- One of the buttercups
- One of the Bx Bombers
- One of the B’s in B&B
- One of the CA Santas
- One of the Cabinet depts
- One of the Caddoes
- One of the Caesars
- One of the Caesars
- One of the California Santas
- One of the Californias
- One of the campaign issues
- One of the campaigners
- One of the Canaries
- One of the Canaries: Abbr
- One of the Canary Islands
- One of the Canary Islands
- One of the candidates
- One of the canonical hours
- One of the Canterbury pilgrims
- One of the Canterbury pilgrims
- One of the Canterbury stories
- One of the Cantors
- One of the cap'n's crew
- One of the Cape Verde islands
- One of the capitalist class
- One of the capitals of China
- One of the Cappadocian Fathers
- One of the cardinal signs
- One of the cardinals
- One of the Caribbean's ABC islands
- One of the Carnegies
- One of the carnies
- One of the Carolinas
- One of the Caroline Islands
- One of the Caroline Islands, former Japanese naval base
- One of the Caroline islands
- One of the Carolines
- One of the Carolines
- One of the Carolines: Abbr
- One of the Carpenters
- One of the Carpenters, in 1970s pop
- One of the Carradines
- One of the carriers in the SkyTeam alliance
- One of the Carringtons on "Dynasty"
- One of the Carringtons, on "Dynasty"
- One of the Carsons
- One of the Carters
- One of the Cartwright boys
- One of the Cartwright brothers?
- One of the Cartwrights
- One of the Cascades
- One of the Caseys
- One of the Cassidys
- One of the Castles
- One of the Castros
- One of the cats in "Cats"
- One of the cattle in a cattle drive
- One of the Cavalier poets
- One of the Cavalier poets
- One of the cavies
- One of the Celtic languages
- One of the Celtic nations
- One of the Central Provinces: Abbr
- One of the Cesars
- One of the Challenger astronauts
- One of the Chamberlains
- One of the Champions
- One of the Champions
- One of the Chaneys
- One of the channel islands
- One of the Channel Islands
- One of the Chaplins
- One of the Chaplins
- One of the Chases
- One of the Chekhov's Three Sisters
- One of the Chekhov's "Three Sisters"
- One of the Chicago Bears
- One of the Chicago Eight
- One of the chief Philippine dialects
- One of the chief seaports of Samoa
- One of the Chinas
- One of The Chipmunks
- One of the choices on a computer's 17-Across
- One of the Churchills
- One of the Churchills
- One of the Cinque Ports
- One of the Cinque Ports, in Sussex
- One of the Cinque Ports, Sussex
- One of the Cinque ports
- One of the CIO's first members
- One of the Cities of the Plain