Related Clues:

• Forgets one's lines, e.g.
• Folds under pressure
• Throttles
• Suffocates or asphyxiates
• Alpine country has nothing on Kildare¿s gags
• Fails under pressure
• Is overcome with emotion, with 'up'
• Performs way worse than is expected, say
• Engine parts — throttles
• Fails during a crucial moment