Related Clues:

• Subatomic particle that comes in "flavors"
• Particle in protons
• "Strange" subatomic particle
• Cut down on binding agent?
• Sticky-sounding particle
• Particle to attach firmly, we're told
• Elemenrary particle
• Aptly named particle that binds quarks together
• Tiny binder supposedly at first getting lost under old notepaper
• Subatomic particle whose flavors are scattered about this puzzle
• Particle binding quarks together