Possible Clues:

• Delightful meal reduced by one penny
• Drink beer occasionally -- excellent
• Half-hearted meal? It’s wonderful!
• "Amazing!"
• Tiptop
• 'All right!'
• Strange in Morse's case, man enjoying ale when a penny drops
• Marvellous agent, American, returned
• Great being ahead in series? Not half!
• Lovely tea, soft leaves