Related Clues:

• “Don’t worry”
• 'Don't fret!'
• "Not a problem"
• Casual response to an apology
• "No biggie!"
• “Everything’s fine”
• "No worries!"
• "No harm, no foul!"
• "It's fine"
• 'All good'
• 'Everything will be alright'
• Generous response to 59-Across
• "Stop fretting"
• "No big deal!"