Related Clues:

• Push hard
•     Farm-made butter
• Word to the chauffeur
• Rear-end, e.g.
• Ambition's kin
• Bash into
• Crash into
• Old gate-crasher
• Operate, as an auto
• Transport for Phrixus
• Butt heads
• Shearling's dad
• St. Louis gridder
• Battering tool
• Kid's father