There is a total of 31007 clues beginning with in
- Intro to economics?
 - Intro to Egypt?
 - Intro to Euclidean geometry?
 - Intro to girl
 - Intro to history or science?
 - Intro to Juan
 - Intro to law?
 - Intro to many a colon
 - Intro to many an adage
 - Intro to many words?
 - Intro to marketing?
 - Intro to math?
 - Intro to painting class
 - Intro to painting class, perhaps
 - Intro to painting class, say
 - Intro to Paulo
 - Intro to Paulo or Pedro
 - Intro to Pedro
 - Intro to physics
 - Intro to physics?
 - Intro to Roni
 - Intro to science?
 - Intro to sociology?
 - Intro to space
 - Intro to suede?
 - Intro to surgery
 - Intro to surgery?
 - Intro to the military
 - Intro to the military, for some
 - Intro to Torts student
 - Intro to VW
 - Intro to Wall St?
 - Intro to Xer, Yer, and Zer
 - Intro to zoology?
 - Intro with centric
 - Intro, in journalism jargon
 - Intro, maybe
 - Intro-level class teachers, often
 - Intro-level info
 - Intro-to-Spanish word
 - Introduce
 - Introduce (with "in")
 - Introduce a new line of accessories for skateboarders?
 - Introduce a tune?
 - Introduce again
 - Introduce again
 - Introduce arbitrarily
 - Introduce at intervals
 - Introduce bias into
 - Introduce by degrees
 - Introduce during a newscast, say
 - Introduce gradually
 - Introduce gradually, with "in"
 - Introduce one's self
 - Introduce oneself
 - Introduce opposition
 - Introduce regularity
 - Introduce robots, say
 - Introduce slyly
 - Introduce something new
 - Introduce something new
 - Introduce to knight life
 - Introduce to knight life?
 - Introduce to solid food
 - Introduce to solid foods
 - Introduce to the mix
 - Introduce unfairly (with "in")
 - Introduce yourself to
 - Introduce, as a new year
 - Introduce, as a question
 - Introduce, as a subject
 - Introduce, as an issue
 - Introduce, as flavoring
 - Introduce, as something new
 - Introduce, informally
 - Introduce, with "in"
 - Introduce, with "out"
 - Introduce
 - Introduced
 - Introduced (by)
 - Introduced a show
 - Introduced acts, eg
 - Introduced as a topic of conversation
 - Introduced for acceptance
 - Introduced gradually
 - Introduced gradually, with "in"
 - Introduced in stages, with "in"
 - Introduced in stages
 - Introduced oneself
 - Introduced performers
 - Introduced surreptitiously
 - Introduced to the mix
 - Introduced to the mix: 2 wds
 - Introduced to the world
 - Introduced with formality
 - Introduced, as a new era
 - Introduced, as a new product
 - Introduced, as a subject
 - Introduced, slangily