Possible Clues:

• The bubbles in bubble tea, usually
• Top CIA agent initially mixed pudding
• To cap a mixture I included starch
• Pudding variety
• Starchy dish
• Starch used in puddings
• Bubble tea pearls
• It's put in pudding to knock up a firm one
• Pudding a firm one Irishman sent back
• Games masters tucked into milk and a pudding