There is a total of 7453 clues beginning with of
- Of joints
 - Of Jungfrau's locale
 - Of jungle royalty
 - Of Kamin's comedy sketches?
 - Of Karnak's river
 - Of Keats' forte
 - Of keys and chords
 - Of kidneys
 - Of Kilkenny or Killarney
 - Of kind society
 - Of King Cole's birth?
 - Of king or kingdom
 - Of kings
 - Of kings and queens
 - Of lakes
 - Of Lamb's writings
 - Of Lammermoor or Frankenstein
 - Of language style
 - Of languages: Suffix
 - Of large capacity
 - Of large river mouths
 - Of large-group activities
 - Of last month
 - Of lasting importance
 - Of lasting value
 - Of late
 - Of late
 - Of later vintage
 - Of law
 - Of law: Lat
 - Of law: Latin
 - Of layers
 - Of layers of material
 - Of layers of rock
 - Of least account
 - Of least importance
 - Of least mad mind
 - Of least significance
 - Of least value
 - Of least worth
 - Of leaves
 - Of leaves, in a way
 - Of legal age
 - Of legend
 - Of legislators
 - Of lemons or limes
 - Of lemons, limes, etc
 - Of length: Abbr
 - Of less frequency
 - Of less importance
 - Of less than 90 degrees
 - Of less value
 - Of less worth
 - Of lesser importance
 - Of lesser importance, in law
 - Of lesser quality
 - Of lesser size
 - Of lesser status
 - Of lieges and lords
 - Of life
 - Of life expectancy measurement
 - Of life-expectancy calculation
 - Of like measure: Prefix
 - Of like mind
 - Of like nature
 - Of like opinions
 - Of like status
 - Of limited availability
 - Of limited existence
 - Of limited extent
 - Of limited scope
 - Of limited width
 - Of linguistic inflection
 - Of little account
 - Of little account
 - Of little consequence
 - Of little extent
 - Of little importance
 - Of little importance in Poland?
 - Of little interest
 - Of little moment
 - Of little use
 - Of little value
 - Of little value or account
 - Of little value
 - Of little value: Colloq
 - Of little worth
 - Of little ___ use
 - Of living organisms
 - Of living things
 - Of llama country
 - Of local importance or interest only, in Britain
 - Of lofty peaks
 - Of long duration
 - Of long duration
 - Of long experience
 - Of long standing
 - Of long standing, as a friend
 - Of long standing
 - Of longer standing