Related Clues:

• Like some military actions
• Detachment behind a military force
• Following force
• Military detachment in the back
• Troops protecting the back
• Entrenched element in party to raise security
• It covered the lines at Waterloo
• Protective train buffer?
• Such actions are rarely offensive
• Where van's often on line with its occupant not in the van
• Troops protecting back of military formation
• A rare drug administered for coping with back trouble
• Defensive action
• Stern rail employee's defence
• Conservative element of a community