Possible Clues:

• Wobbly step counter?
• Stagger, be unsteady
• Proceed unsteadily
• Accountant perhaps -- one looking for scrap?
• Rag-and-bone man
• Adder can't even do this, having no feet (6)
• Sounds as if an adder may be about to fall
• About to fall for the adder?
• Having no feet, the adder can hardly walk
• Perhaps summer for an adder for 20 across walk