Related Clues:

• Attuned
• Nervous, with 'up'
• Like this puzzle
• Tensed, with 'up'
• Atwitter, with 'up'
• Tipped off
• Excited, with 'up'
• Worked (up)
• Like crossword puzzles
• Tense (with ''up'')
• --- in (informed)
• Like a piano
• Tense (with "up")
• Like crossword puzzle entries
• -- up (excited)