Possible Clues:

• Emphasize, as a point
• What some commuters do after work produces stress
• Impress thoroughly, settle an argument
• Return and impress
• Stress in evening rush hour?
• Emphasise - return to one's abode?
• Instead of a car, take a 4 down to nail it
• Take the car back with a hammer
• Make very obvious trip back to base
• Stress brought by evening commute?