Possible Clues:

• Dancer, friend bearing 5 eggs for singular 5 19 down
• Ingredient in zuppa inglese
• Hot yellow sauce with different starter - now it's for pudding!
• Flan, perhaps
• Doughnut filler
• Led Zeppelin "___ Pie"
• Way amateur infuses part of milk to produce sauce
• Sweet sauce for cartoon cat
• The sauce of American sailor captured by Civil Defence
• Yellow sauce served on hot desserts