Possible Clues:

• Swizzle stick
• Coffee shop freebie
• Agitator
• Troublemaker with a coffee shop utensil
• Stick in a paint can
• Swizzle stick, basically
• Troublemaker engineering several revolutions in Darjeeling?
• One causes trouble in a roundabout way
• A troublemaker, but good at mixing
• Bar accessory