Possible Clues:

• Word before 'perspective' or 'algebra'
• — Equation; — accelerator
• Like the shortest path between two points
• Going from point A to point B
• One-dimensional retro part of transport infrastructure crossing small space
• Word before "algebra" or "thinking"
• Like the equation y = 2x + 3
• Going straight
• Straight in, real switches
• Perjurer ringing once, oddly not involved in a row