Related Clues:

• "___ said it before . . ."
• It may be added to impress
• '-- had it!'
• 'Now -- seen it all!'
• '-- been working...'
• 'Muskrat Ramble' composer
• Suffix with excess
• Direct extender
• Stick-to-it-___
• Access ending
• Correct ending
• '___ Got the World on a String'
• '___ got an idea'
• ''__ been thinking . . .''
• Some add it to impress