Possible Clues:

• Sticky icky stuff
• Axle grease, e.g
• Repeated word in John Rzeznik's band name
• Mushy food or a baby's word
• Infantile word
• Too-sweet sentiment
• Nickelodeon's trademark slime
• Foolish sentimentality
• Baby's first syllable, sometimes
• Hot 17-Across, e.g