Possible Clues:

• Bosses of acerbic nature have the advantage
• Initial advantage
• Dessert for Edith?
• Early advantage secured by the boss's floozie
• Bosses of acerbic nature have initial advantage
• It's an advantage
• A good beginning using one's loaf
• Advantage gained ultimately by top performer in contest
• An early advantage for the star ad
• Principal's acerbic to gain initial advantage