Related Clues:

• Pleasant
• X-ray dose
• Warm and friendly
• Physicist's unit
• Gnarly
• Exclamation
• Response to pyrotechnics
• "Groovy!"
• Nifty, in the '50s
• Drink order
• 'Gnarly!'
• Spick-and-span
• Sound of delight
• "Way to go!"
• Straight up