Related Clues:

• Expansion
• Executive's extra benefit
• Reserved parking space for an exec, maybe
• Enliven, with ''up''
• Company car, say
• Use of a corporate jet, say
• Garage, perhaps
• Building wing, e.g.
• Extra, and this puzzle's title
• Employee discount, e.g.
• Include as a bonus
• On-the-job extra
• Exec's car, say
• Build an annex
• Private jet, e.g.