Possible Clues:

• Only beardless Disney dwarf
• Stupefied; silly
• Disney dwarf who 'never had anything to say'
• It's stupid to kill victim — run away!
• Friend of Snow White
• Sleepy companion?
• One of Seven Dwarfs - not too bright
• Do exercise before you initially become stupefied
• 'Dense grass by ditches black!'
• The Old School returns one out of seven