Possible Clues:

• "Hands off!"
• The Say ___ Kid (Willie Mays)
• One-third of Fat Albert's catchphrase
• '--, you!'
• With 29-Down, greeting for Mrs. Kowalski in 'A Streetcar Named Desire'
• What Outkast says before "Ya!"
• Part of Fat Albert's line
• '-- Jude'
• With 78 Across, brusque greeting
• 'Whaddaya know!'