Related Clues:

• It may be past or present
• Like a tuned drumhead
• Not easygoing
• Nerve-racking
• On the verge of snapping
• Grammar class subject
• Hardly easygoing
• Antsy
• Without wrinkles
• Thin-skinned
• In a snit
• Stretched to the limits
• Showing strain
• Strung out
• Unloose