Possible Clues:

• Accepting without verification
• Jumping to conclusions, and what's spelled out by the eight letters that have literally jumped to conclusions
• Taking for granted amount of money in ill-gotten gains
• If and when to spill the beans, restraining doubtful statement?
• Thinking it's a small amount of money for gin cocktail
• Expecting amount to be collected in a vocal performance
• Supposing it's a small amount of money for gin cocktail
• Haughty fool of the upper classes of a ruling dynasty
• Arrogant, if true
• Impudent tot interrupts a choral session