Possible Clues:

• Climbing aid in hamper by leg
• Item climber starting off over slope has on for support?
• Keep checking climbing gear
• Spiked attachment for a climbing boot
• Climber’s aid is a disadvantage round slope
• Trick needed to cross slope -- something climber uses
• Spiked attachment's trick to take on slope
• This will help prisoner grapple with gradient
• Awkwardly confine leg in climbing gear
• Climber's device