There is a total of 31007 clues beginning with in
- Introduction to haw
 - Introduction to Hebrew?
 - Introduction to Herodotus?
 - Introduction to impressionism?
 - Introduction to Juan?
 - Introduction to Latin?
 - Introduction to magic?
 - Introduction to marketing?
 - Introduction to math?
 - Introduction to metric?
 - Introduction to metrics?
 - Introduction to Mr Nice Guy
 - Introduction to Mr Nice Guy?
 - Introduction to Neuroscience, for one
 - Introduction to opera?
 - Introduction to physics
 - Introduction to physics?
 - Introduction to Plan B
 - Introduction to politics?
 - Introduction to psychology
 - Introduction to psychology?
 - Introduction to Romeo
 - Introduction to science?
 - Introduction to sex?
 - Introduction to smoking?
 - Introduction to sociology
 - Introduction to space?
 - Introduction to Steven?
 - Introduction to surgery?
 - Introduction to the Constitution
 - Introduction to the Man in Black?
 - Introduction to the public
 - Introduction
 - Introduction: Abbr
 - Introductions
 - Introductions cliché
 - Introductions handler
 - Introductions of discourses
 - Introductions to bks
 - Introductions
 - Introductions; prefaces
 - Introductory
 - Introductory appearances
 - Introductory assortment of wreckage?
 - Introductory ballet instruction
 - Introductory bit
 - Introductory bit (Var)
 - Introductory book
 - Introductory course
 - Introductory course for painters
 - Introductory course, in college
 - Introductory course, often
 - Introductory course, perhaps
 - Introductory course?
 - Introductory courses?
 - Introductory discourse
 - Introductory discourses
 - Introductory drawing class
 - Introductory episode
 - Introductory foreign language class suggested by this puzzle’s theme
 - Introductory French course
 - Introductory French infinitive
 - Introductory Greek letters
 - Introductory humanities class
 - Introductory info
 - Introductory Italian course?
 - Introductory jazz passage
 - Introductory language course
 - Introductory letter?
 - Introductory letters
 - Introductory letters?
 - Introductory material
 - Introductory movement of fugue
 - Introductory musical passage
 - Introductory numbers
 - Introductory offer
 - Introductory offer
 - Introductory offers
 - Introductory page
 - Introductory painting class
 - Introductory painting class, perhaps
 - Introductory part
 - Introductory phase
 - Introductory quotation
 - Introductory reading
 - Introductory remarks
 - Introductory remarks and, in a different sense, what the ends of 20-, 35- and 42-Across are
 - Introductory scene in some rom-coms
 - Introductory section
 - Introductory section of a story
 - Introductory section, in music
 - Introductory sections
 - Introductory statement
 - Introductory steps
 - Introductory studio class
 - Introductory text
 - Introductory TV episode
 - Introductory word
 - Introductory words