Related Clues:

• Relaxes
• Undoes
• Lets out
• Eases
• Makes less tense
• Eases up on
• Unties
• Relaxes, as one's grip
• Opens with effort, as a window
• Unfastens
• Release water birds to fly around Kent
• Lets out a bit
• Warms (up)
• Makes less tight
• Peels off, perhaps