There is a total of 31390 clues beginning with on
- One of two in Mozart's string quintets
- One of two in Princess Leia's hairstyle
- One of two in seven: Abbr
- One of two in soccer
- One of two in some marriages
- One of two in the Adidas logo
- One of two in the larynx
- One of two in the McDonald's logo
- One of two in the upper jaw
- One of two in this clue
- One of two in Tuvalu
- One of two in “business suits”
- One of two involved with rackets
- One of two Jessicas in 2010's "Valentine's Day"
- One of two kinds of USNA grads
- One of two LA elevens
- One of two landlocked African countries whose names are almost the same
- One of two letters in "timid"
- One of two Mad rivals
- One of two made by Gore in 2000
- One of two matching beds
- One of two matching colors with different spectra
- One of two members in baseball's "700 Club"
- One of two MetLife Stadium NFL teams
- One of two Monopoly squares: Abbr
- One of two movie adventurers
- One of two NT books
- One of two NT books: Abbr
- One of two NBA teams located in their original cities
- One of two needed for a score
- One of two needed for double Dutch
- One of two needed to strike a coin
- One of two New Testament books
- One of two next to home plate
- One of two nonwaiters
- One of two NT books
- One of two nuclides with the same neutron number but different proton numbers
- One of two OT books
- One of two of a kind
- One of two of Henry VIII's six
- One of two of Henry's six wives
- One of two of the Seine
- One of two of the VIII's six
- One of two official Israeli languages
- One of two official languages of Sri Lanka
- One of two official Philippine languages, along with English
- One of two Old Testament books
- One of two Old Testament books
- One of two Old Testament talking animals
- One of two on a 1959 Cadillac
- One of two on a basketball team
- One of two on a biplane
- One of two on a brig
- One of two on a buck
- One of two on a car
- One of two on a coordinate graph
- One of two on a coupe
- One of two on a diamond
- One of two on a guitar
- One of two on a magnet
- One of two on a schooner
- One of two on a short date?
- One of two on a three-speed
- One of two on a tricycle
- One of two on a typical auto
- One of two on a winter cap
- One of two on a yawl
- One of two on an automobile
- One of two on most cars
- One of two on some wedding cakes
- One of two on Thanksgiving
- One of two on the back of a dime
- One of two on the crying-with-laughter emoji
- One of two on the Titanic
- One of two opposing forces
- One of two options at a fast food restaurant
- One of two options on a stitched towel
- One of two or more existing forms of an element
- One of two or three in a typical orchestra
- One of two OT books
- One of two parties to 38-Across
- One of two partners teamed up throughout this puzzle
- One of two parts of a British puzzle?
- One of two parts of a shirt
- One of two party leaders
- One of two Pauline epistles: Abbr
- One of two penguin species endemic to Antarctica
- One of two photos in an ad
- One of two Plantagenet kings
- One of two points in an orbit
- One of two polar opposites
- One of two poles
- One of two popular positions?
- One of two possibilities to Paul Revere
- One of two possible Passover mos
- One of two presidents
- One of two presidents between a James and an Andrew
- One of two presidents graduated from Harvard Law School
- One of two presidents with two Ivy League degrees
- One of two proverbially bad waiters