Possible Clues:

• One is paid not to be backward one particle
• Atomic constituent
• Positively-charged particle
• Is there a particle of weight for the professional?
• The professional is positively not up to it - even a particle
• In favour of putting on weight - just a little bit
• Positive nucleon
• Tiny item charged for by weight
• Positive-charged particle
• Is there a particle of weight to be attached to a professional?