Possible Clues:

• Up-hill through barrier needs throttle
• Strangler's target struggled to keep in centre of crowd
• Mob weapon
• Throttle: Var.
• Choke from carburettor a garage put back
• Length of cord in rubbish blocking entrance
• Throttle needed when entrance is blocked by rubbish
• Perish in passage, a nasty way to die
• Rubbish in entrance, it's enough to take one's breath away
• Inquisition's iron collar