Related Clues:

• Burst of light
• Let out lava
• Emulate Vesuvius
• Show one's rage
• Make like Mount St. Helens
• Act like a volcano
• Give vent to anger
• Pioneer, as a trail
• Arsonist's aim
• Go off like Mount St. Helens
• Emulate 18 Down
• Arsonist's goal
• Gush, as a volcano
• Break out, as fighting
• Go off like Vesuvius