Related Clues:

• Look surreptitiously
• Chick's sound
• Break an Xmas rule
• See 31-Across
• Furtive look
• Make sure
• Verify
• Small sound
• Sound from a nest
• 'Got it'
• Examine
• Look up and down
• Slight remark
• One way to pay
• 'Don't make a ___!'