Related Clues:

• Widened
• Gambler's concern
• 'Accident ahead' indicator
• Expand upon
• Become wider
• Expand, as one's horizons
• Suddenly intensify, with "up"
• Butter, e.g.
• Burst of light
• Roadside alert
• Distress signal shot into the air
• Make wider
• Bell-bottoms feature
• Butter or jam
• Dilate