Related Clues:

• No stay-at-home
• Activist
• Opposite of a thinker
• Live wire, so to speak
• Busy one
• No layabout
• Wrong end?
• One on the go
• No mere spectator
• Hardly a side-liner
• Not the retiring type
• Performer
• Mover and shaker
• Dynamo
• No couch potato, him