Possible Clues:

• Stick on the end of it, soon to have no tail, either
• It could be turned into toad with essential elements of spell
• A frog-to-be
• Jot extreme position down — one as yet undeveloped
• Swimmer gets a little stick
• Baby amphibian
• Youngster in Po Delta, swimming?
• Little need for decathlete swimmer
• One could make leap to edge of pond -- after transformation!
• Young swimmer needing little support