Related Clues:

• The "p" in "mph"
• "As __ our agreement"
• Days ___ week
• One ___ customer (sale enticement)
• With 9-Down, traveling employee's allowance
• Word that may be replaced by a slash
• Days ___ year
• Word in a ratio
• Piece of rpm
• Miles-gallon link
• Pay-__-click
• Limit two ___ customer
• As __ usual