Related Clues:

• Gung-ho and then some
• Uneasy
• Ready to go, already
• Enthusiastic, and then some
• Squirming, perhaps
• On pins/needles
• Avid and then some
• Frighteningly fervent
• Hardly settled
• Like an ardent fan
• Likely to fidget
• Like many a Type A
• Itching to leave, say
• Like some scary dogs
• Having the jitters