Possible Clues:

• Parade she organised from the van
• Attack in van
• The point is at the front, metaphorically
• Group leading an attack
• What's the point of an attack?
• In various parades ambassador's taken lead
• Reshaped a broken-down van
• Point to weapon man carried in various parades
• Williams, perhaps a man overwhelmed by low front
• Lead tip on manual weapon