Possible Clues:

• Basket-maker getting thanks for a fine biscuit
• Almond flavoured biscuit produced at a fair
• Informant has an order cut back for almond liqueur
• Head of Cosa Nostra supplanted by informer -- it's essentially nuts
• Liqueur recalled: first rate, rich — a tip for dinner!
• Cordial rogue with criminal gang needing no introduction
• Almond liqueur
• Almond flavoring
• Looking back, draft includes obese middleman in Cracker with a little alcohol perhaps
• Kind of liqueur drunk at a fair