There is a total of 21148 clues beginning with lo
- Longest side of a rt triangle
- Longest song on Dylan's "Street-Legal"
- Longest song on Pink Floyd's "The Dark Side of the Moon"
- Longest song to reach #1 on the Billboard Hot 100
- Longest Spanish river
- Longest state abbr
- Longest stream entirely in Switzerland (183 mi)
- Longest Swiss river
- Longest Swiss river (Var)
- Longest Swiss river
- Longest Swiss waterway
- Longest time
- Longest time division
- Longest time span, geologically
- Longest Ubangi tributary
- Longest venomous snake in the New World
- Longest wholly Spanish river
- Longest wholly Swiss river
- Longest wholly-Swiss river
- Longest word in English containing only one vowel
- Longest word not containing an a, e, i, o, or u
- Longest, second largest and deepest of Africa's lakes
- Longest-lived
- Longest-lived first lady
- Longest-living member of the Rat Pack
- Longest-reigning British monarch
- Longest-reigning British monarch, informally
- Longest-running American humor mag
- Longest-running Broadway musical until "Pins and Needles" in 1939
- Longest-running Broadway show
- Longest-running member
- Longest-running network TV show
- Longest-running rock trio with the same lineup
- Longest-running series on network TV
- Longest-running show in Broadway history until 1/9/06
- Longest-running TV series
- Longest-serving
- Longest-serving Boston Symphony director
- Longest-serving current Justice
- Longest-serving current Supreme Court justice
- Longest-serving Dodger coach Manny
- Longest-serving French president
- Longest-serving independent in congressional history
- Longest-serving Independent member of Congress in US history
- Longest-serving Israeli prime minister, familiarly
- Longest-serving Japanese prime minister
- Longest-serving justice in Supreme Court history
- Longest-serving KGB chairman (1967-'82)
- Longest-serving late-night TV host in the US
- Longest-serving member
- Longest-serving of the current associate justices
- Longest-serving ones
- Longest-serving POTUS
- Longest-serving Prime Minister of India
- Longest-serving prime minister of Japan
- Longest-serving reporter on "60 Minutes"
- Longest-serving Republican senator in history
- Longest-serving Republican senator, 1977-2019
- Longest-serving Secretary-General
- Longest-serving senator in US history
- Longevity
- Longevity at the box office
- Longevity, so to speak
- Longfellow adverb
- Longfellow adversary
- Longfellow and Burns
- Longfellow bell town
- Longfellow character
- Longfellow character
- Longfellow chief
- Longfellow classic
- Longfellow classic containing a code that is represented within the answers to the asterisked Down clues
- Longfellow concern
- Longfellow contemporary
- Longfellow creation
- Longfellow girl in "Children's Hour"
- Longfellow hero
- Longfellow heroine
- Longfellow heroine
- Longfellow home site
- Longfellow Indian
- Longfellow locale
- Longfellow locale
- Longfellow lover
- Longfellow maiden
- Longfellow opus
- Longfellow or Millay, by birth
- Longfellow poem
- Longfellow poem featuring the line "Footprints on the sands of time"
- Longfellow poem featuring the line "One if by land, and two if by sea"
- Longfellow poem featuring the line "Such songs have power to quiet / The restless pulse of care"
- Longfellow poem featuring the line "This is the forest primeval"
- Longfellow poem featuring the line "This is the poem of the air"
- Longfellow poem subject
- Longfellow poem subtitled "A Tale of Acadie"
- Longfellow poem
- Longfellow setting
- Longfellow stopover
- Longfellow subject
- Longfellow town