Possible Clues:

• Take a drink with troops going over the top
• Creamy sauce on half of meal? You'll need drink first
• Chief, first to size up regiment
• Unrivalled
• Highest in authority; rich cream sauce (dish)
• Highest of all
• Best member of a Motown group
• Drink leads regiment to get the highest
• Drink again before me, the chief
• Best drink with technical unit