Related Clues:

• Fine-tunes
• Polishes
• Removes impurities from
• Purifies
• Finetunes
• Purifies, as petroleum
• Rids of impurities
• Polishes some lederhosen if erroneously held up
• Spanish girl given a whistle, perhaps, improves a bit
• Purifies, as ore
• Makes purer
• Makes small improvements to
• Improves with small changes