Related Clues:

• Tightly wound
• Tied up in knots
• It can be past or present, in grammar
• Verb form
• Anxiously impatient
• Affected by poison ivy
• Grammar concern
• Like some performance art
• Scratching the surface?
• Not content
• Far from laid-back
• About to snap
• Pushing the envelope
• Like a bundle of nerves
• Innovative and daring