Related Clues:

• Appropriate rhyme for sneak
• Bird-shaped marshmallow
• 'Not a ___!'
• Sound from inside an incubator
• Tentative look
• Tweet from Papa -- 'Extreme pressure besieging base'
• Furtive look (made by a small bird?)
• A secret look
• Look sound either way
• Take a quick look at exercise record
• Go quiet, making little noise
• Spy's tweet
• Have a gander to hold back
• Surreptitious look; high-pitched chirp
• "Not a ___ out of you!"