Related Clues:

• Finally on the way upstairs one has a book
• Up the street one may see this in print in there underfoot
• Puts one's foot down by the book after tea
• Puts your foot down on the tyres
• Puts one's foot down on what one does with the book at last
• Tire parts
• Walks or steps on
• Takes steps to study in a back street
• Takes steps to start studies
• Walks from road junction and maybe looks at instructions?
• They're perpendicular to risers
• Puts one's foot down and studies after start of term
• Where the rubber meets the road
• Grooved tire surfaces
• Pirelli patterns