Related Clues:

• Rise, as a river
• Singular source for expansion
• Great (American)
• "Wow, neat!"
• Splendid wave
• Dandy that's experienced at sea
• Magic mushroom
• Son in good health? That’s dandy
• "Wow, that's neat!"
• “Peachy keen!”
• Foppish fellow also losing head
• "Hey, that's great!"
• Wonderful hawk circling wide
• “Super!”
• 'Just peachy'