Possible Clues:

• My method of investing yen
• 'Fancy!' = 'Indeed!'
• Is a vote in the affirmative, producing a surprised reaction
• Phrase for Foghorn Leghorn
• "Leaping lizards!"
• 'Look here, old chap ...'
• Repeated phrase in ''Let's Call the Whole Thing Off''
• Words to an ''old chap''
• My word is final in Canada, Yankee
• "You say goodbye, ___ hello ..."