Related Clues:

• Calculator symbol
• Insertion signal
• Insertion indication
• Valuable quality
• Anode indicator
• Problem sign
• Added value
• "Insert here" sign
• Desirable extra
• Shift-6
• "Besides . . ."
• "Besides that ..."
• "Not only that . . ."
• 26-Across enhancement
• "Besides that . . ."