Related Clues:

• 'In addition ...'
• Calculator symbol
• Valuable quality
• Won with QxN, e.g.
• Like shoes and socks
• Anode indicator
• Problem sign
• Added value
• Desirable extra
• "Besides . . ."
• "Besides that ..."
• Unable to avoid the check?
• "Not only that . . ."
• 26-Across enhancement
• "Besides that . . ."