Related Clues:

• Brace, in a way
• Present, e.g.
• It can be past or present
• On tenterhooks
• Drawn tight
• All wound up
• Ex-lax?
• Lacking play
• Tightly stretched
• Grammarian's concern
• Stiffen
• Not cool at all
• English class topic
• Emotionally charged
• Walking on eggshells