Possible Clues:

• Army group's signal to get back
• Engineers point to prompt delivery
• Save for this, 'e cures it
• Such cures will save the East
• Can the engineer help making a cannon with this?
• "Baywatch" staple
• Is this the engineer's tool for making a cannon on the table? Will that help?
• Make secure, possibly
• Engineers prompt Conrad's ?deliverance
• Regret having swallowed key, seeking release