There is a total of 48826 clues beginning with th
- Third X
- Third X in a game
- Third X or O
- Third X, in a simple game
- Third X, perhaps
- Third year in 31-Across's reign
- Third year in the reign of Edward the Elder
- Third year of Nero's reign
- Third year of Nero's reign
- Third year of the second century
- Third __
- Third __ (power source)
- Third ___
- Third ___ (character who delivers the line in 60-Across)
- Third ___ (dangerous part of a subway track)
- Third ___ (subway track part)
- Third ___ (track adjunct)
- Third ___ Blind
- Third ___
- Third, fourth and so on
- Third, in Thuringia
- Third, to Caesar
- Third-ager
- Third-and-long option
- Third-and-long play, usually
- Third-base coach's sign
- Third-base coach's sign, perhaps
- Third-base coach's sign, sometimes
- Third-base coach's signal
- Third-brightest star in a constellation
- Third-busiest airport
- Third-busiest US airport
- Third-century Chinese dynasty
- Third-century Christian martyr
- Third-century date
- Third-century invaders
- Third-century pope
- Third-century sackers
- Third-century starter
- Third-century year
- Third-class
- Third-col heading
- Third-column stat
- Third-day creation
- Third-day creations
- Third-degree
- Third-degree, as a polynomial
- Third-degree, in math
- Third-ever Best Actor Oscar winner
- Third-generation Genesis figure
- Third-generation Genesis name
- Third-generation Japanese-American
- Third-generation Japanese-Americans
- Third-generation man, in the Bible
- Third-generation nickname
- Third-generation Oscar winner
- Third-generation release of 2012
- Third-generation son
- Third-generation tablet of 2012
- Third-grade groups?
- Third-grader's statistic
- Third-largest asteroid
- Third-largest city in Arizona
- Third-largest city in Florida
- Third-largest city in Italia
- Third-largest city in Italy
- Third-largest city in Japan
- Third-largest city in Nevada
- Third-largest city in Poland
- Third-largest city in Puerto Rico
- Third-largest city in Washington
- Third-largest city of Colombia
- Third-largest city of France
- Third-largest city of France
- Third-largest city of Switzerland
- Third-largest city of the later Ottoman Empire, surpassed only by Constantinople and Cairo
- Third-largest city of the Roman Empire
- Third-largest city of Turkey
- Third-largest Danish city
- Third-largest E African lake
- Third-largest French-speaking city in the world [hint: it's in Ivory Coast]
- Third-largest German city, to Germans
- Third-largest Hawaiian island
- Third-largest island
- Third-largest island in the Caribbean
- Third-largest island in the world
- Third-largest island of Italy
- Third-largest Italian island
- Third-largest Japanese city
- Third-largest moon of Saturn
- Third-largest Nordic city
- Third-largest ocean
- Third-largest of the Balearic Islands
- Third-largest of the Hawaiian Islands
- Third-largest of the world's oceans
- Third-largest South American country
- Third-largest Turkish city
- Third-largest US city
- Third-leading US crop behind corn and wheat
- Third-least populous state