Related Clues:

• Substitute for, as a pitcher
• ''Back off!''
• 'Take a chill pill'
• Cut some slack
• Make simpler
• Allay
• Make less difficult
• Become less intense
• Substitute for
• De-intensify
• Become moderate
• Put the brakes on
• Lower the intensity
• Let up on
• Lighten a burden or raise a seige