Possible Clues:

• High landform
• Narrow hill-range
• Bump between furrows
• Free to mount, for example, on back of whale
• If a cart were to go over this it might go off
• Part of mountain is cold place - zero Fahrenheit on top
• Peak offering free return for example
• See 10
• The cart would shoot over the rough bit
• The raised end of 11 across