Possible Clues:

• Polished and seductive but wanting approval mostly
• Mate got off methadone and improved
• Fine-tuned, as a razor
• United shown in high definition, becoming polished
• Initially heavy duty keeps one sharp
• Sharpened, as a dull blade
• Used a whetstone on
• Fine-tuned, as skills
• Refined individual in Holland cleared out
• Perfected, as one's skills