Possible Clues:

• Servant; accompanying
• Assistant
• This will serve to make a teetotaller insecticidal
• Servant
• Aide
• Entourage member
• A nurse after time with worker and follower
• One may be waiting to be a teetotaller and be insecticidal
• One will serve for a race to finish an insect
• Prufrock felt he was such a lord