Possible Clues:

• Flavor, in a way
• Time for instruction in recipe
• Thirteen episodes, for Mad Men
• Add flavourings
• With 41-Across, good time for a cliffhanger ... or what each of 17-, 24-, 50- and 63-Across has?
• Salt delivers shanties, not G&S
• Add flavour at a certain time of year
• Add flavouring
• 'Ocean's Eleven' finally embracing old period
• In which female's ready to fertilise main offspring