Related Clues:

• Drawn tight
• All wound up
• Ex-lax?
• Tightly stretched
• Grammarian's concern
• Stiffen
• Not cool at all
• English class topic
• Emotionally charged
• Walking on eggshells
• Like a tie game in overtime
• Suspenseful
• Not easy
• Future perfect, for one
• Pluperfect, e.g.