Related Clues:

• A help if the pump's a bit stiff
• Will it warn you're putting your foot down?
• Possible requirement for getting into Oxford?
• It can help one entering court
• Squeeze into space pump, say, with instrument
• Fit into tight space and get clipped holding gardening tool
• It encourages stubborn mule to go on
• Force (into an inadequate space)
• Curved instrument or tool that's cut off outside
• Something that may help you get into Oxford
• Force in garden tool, then cut round it
• Device to help get into footwear
• Help for a tight fit
• Squeeze into a tight space
• Force (into)