Related Clues:

• Excellence
• '___ extra cost'
• 26 for Fe: Abbr.
• Deserve
• Warrant
• Be worthy of
• Reason for a raise
• '___ charge!'
• O's is 8
• Kind of system
• 29 for copper, e.g.: Abbr.
• Case determinant
• Au's is 79
• Deservingness
• With 48-Across, never