Possible Clues:

• Hollow jointed stem of, say, bamboo (4)
• Prison's the ultimate in severe punishment
• Slender stem of bamboo etc
• Fred Astaire prop
• Sugar source for preserve, ultimate in marmalade
• Soundly beat
• Dandy's accessory
• Stem of palm
• Mr. Peanut has one
• A slender rod, perhaps for punishment