Related Clues:

• Call to attention
• Hymn opening
• 'Behold!'
• Carol starter
• Hear
• 'Listen!'
• 'Be present,' in a song
• Carol opening
• '___ fideles...'
• Start of a Christmas carol
• Holiday song title starter
• Entreaty to ''all ye faithful''
• ''Listen!''
• '___ Fideles'
• Old-time exclamation