There is a total of 31390 clues beginning with on
- One of the Pac-Man ghosts
- One of the pairs in a dead man's hand
- One of the Palin children
- One of the Palins
- One of the Papas
- One of the Parcae
- One of the Parcae et al
- One of the Parcae
- One of the Parkers
- One of the Parnassus nine
- One of the parties
- One of the parties: Abbr
- One of the Partridge kids
- One of the partying elite
- One of the Pauline Epistles: Abbr
- One of the peerage
- One of the Peggottys
- One of the Pelican State natives
- One of the Penns
- One of the people responsible for "Spider-Man: Turn Off the Dark"
- One of the Pep Boys
- One of the Perons
- One of the Persian Gulf States
- One of the pet set
- One of the Petes
- One of the PGA tours
- One of the pharaohs
- One of the Pharaohs
- One of the Philippine Islands
- One of the Philippines
- One of the Philippines' most numerous natives
- One of the Philippines
- One of the phobias
- One of the phys sciences
- One of the piano pedals
- One of the Pierides
- One of the Pillars of Hercules
- One of the Pillars of Hercules, across from Gibraltar
- One of the Pillars of Hercules
- One of the Pillars of Islam
- One of the Pinchots
- One of the Pine Islands
- One of the pines
- One of the pins in ninepins
- One of the pioneers of the internet
- One of the Pipers
- One of the pirates in "Peter Pan"
- One of the Pirates of Penzance
- One of the plagues
- One of the Plain People
- One of the Planeten
- One of the planets
- One of the planks in Bryan's platform
- One of the Platonic solids
- One of the Pleiades
- One of the Pleiades with a month named after her
- One of the Pleiades
- One of the Plinys
- One of the Plinys
- One of the Pointer sisters
- One of the Pointers
- One of the poles
- One of the poll-takers
- One of the Polos
- One of the Ponderosa boys
- One of the Ponderosa's Cartwrights
- One of the pool balls
- One of the pool ends
- One of the Poor Clares
- One of the Posts
- One of the Power Rangers
- One of the Powers
- One of the Prairie Provinces
- One of the Prairie provinces: Abbr
- One of the preferred
- One of the premier clubs in the Premier League
- One of the President's cabinet
- One of the President's titles: Abbr
- One of the Presleys
- One of the prexy's staff
- One of the pride of Joy
- One of the priesthood in Herod's time
- One of the primal gods in Greek myth
- One of the primaries
- One of the primary colors
- One of the primates
- One of the Princetonians
- One of the principal cards in skat
- One of the principal centers of French Protestantism
- One of the principal deities in Hinduism
- One of the principal English cheeses
- One of the principles of Kwanzaa
- One of the Prize guys
- One of the Prozorov sisters
- One of the Puritans
- One of the Quad Cities
- One of the Quad Cities, in Illinois
- One of the Quechuan people
- One of the Queen's pets
- One of the Queens