Related Clues:

• That will go down, turn and go up
• It's great so to turn up and get down to it
• Go down, turn, and rise to a great extent (3)
• One must beware of this opening at it
• Pothole
• Go down with what may go up and go off
• Accelerate, perhaps, enough to make one unable to move
• Accelerate and stick to it?
• Perhaps accelerate one to get tight
• 'Stop it going or speed it up, perhaps (6)'
• It's great to go up and yet go down like this
• 'This will go down, turn and go up (3)'
• Accelerate and attend to your seat belt
• Don ate what I've the last of
• Cry 'Uncle!'