Related Clues:

• A trip can be taken on it
• See 30 Across
• Sudden urge
• Bit of spontaneity
• Sudden desire
• Fleeting desire
• Capricious notion
• Sudden fancy
• Capricious desire
• Fanciful desire
• Sudden inclination
• Impulse or caprice
• 'Caprice, notion (4)'
• Odd notion
• Sudden or capricious idea