Possible Clues:

• Swedish singer-songwriter ___ Lo
• "Slithy" thing in "Jabberwocky"
• "Jabberwocky" creature
• Slithy one, to Carroll
• 'Slithy' thing in 'Jabberwocky'
• Carroll's "slithy" thing
• One of Carroll's 'slithy' creatures
• "Slithy" "Jabberwocky" creature
• 'Slithy' 'Jabberwocky' creature