Related Clues:

• Come forward
• Answer the call
• Escalate
• Race, as an engine
• Increase in intensity
• Hasten the pace of
• Increase by degrees
• Accelerate, as an engine
• Make your presence known
• Add punch to
• Promotion
• Gun, as a motor
• Get the engine humming
• Increase - or ascend
• Increase as with pace - or ascend stair?