Related Clues:

• Lunch hour
• Head light?
• Traditional fastball sign
• Start of long-distance dialing
• It's formed in your head
• ''A Chorus Line'' tune
• Birth of a notion?
• Word before ''Blast off!''
• Brain product
• Combined
• Word surrounding ''on'' and ''by''
• Single word
• Glimmering
• Half and half?
• Think tank nugget