Possible Clues:

• Synchronized (with)
• Keeping up (with)
• The Foot must keep it
• The Foot must keep it over one foot
• Arch of a foot
• Get in the little dears back on foot
• Stocking part, e.g.
• Dogs and cats back on foot to Ulster
• Marching with the group
• It's altogether, by the sound of it, over one foot