Possible Clues:

• Control number of workers initially threatened by those in administration?
• Administration
• Control the number of workers initially threatened by somebody in administration?
• Rulers turn green, detaining Vikings briefly
• With letters 7 to 9, some special agents
• Great to keep remaining Northern soldiers in control
• Domination shown in good bowling spell by new chaps at last
• Ruling from chap pocketing deliveries to outskirts of Nottingham
• They're in control in the house
• Conservative politician with Royal Navy personnel beginning to take control