Related Clues:

• Strike back, say
• Brief shock
• Get cracking
• All the clues in this puzzle do this with 36-Across
• Get the ball rolling
• Found
• Retaliate
• Button word, sometimes
• Sound of horror
• Struggle for air
• Sound at a fun house
• Act in opposition
• Strike back, e.g.
• Square on many board games
• Hit back