Related Clues:

• The adder may be about to fall
• That will hardly get along to an amphibious end
• Barely able to walk, one might add
• One might add up to getting near the fall
• The sort of adder that may fall for this
• The adder, having no feet, can hardly walk
• Perhaps it's the adder that's not 11 across
• Adder has no feet, so it can hardly walk
• He will just about make it to the total
• Might it be an adder that's beginning to fall for this?
• Almost fall for an adder-upper
• An adder upper might be about to fall for this
• Going to fall for an adder upper, perhaps
• Scarcely get along as 11 across
• How after tea the beast might hardly walk