Related Clues:

• Go up in the middle
• Igneous rock, originally
• Smiley face smile
• Part of a sector
• Obsidian source
• Parenthesis, e.g.
• It doesn't go full circle
• Storyline
• Not quite a circle
• ''Joan of ---'' (1948)
• Type of lamp
• Discharge between two electrodes
• Welding phenomenon
• Volcanic outpouring
• Pompeii destroyer