Possible Clues:

• Fine-tunes
• Fiddles with
• Tweaks
• Tinkers with
• It's sad about what's right when one makes it right
• Valid commercials about suits
• How sad about the start of 1 across, so one changes it a bit
• Modifies commercials - contents must be fair
• Must start off in a record-player's tunes
• Fine-tunes, e.g.