Related Clues:

• Not be a wallflower
• Barista's concoction
• Add to the batter
• Dance recording
• Pancake-making facilitator
• Coffee, often
• Action verb that's also a Roman numeral
• Gorp, e.g
• Thorough mixture
• Bachelor given loan by union
• He and she double up
• Combine, blend
• Intermix
• Mix, combine
• Mix up book — what library does