Related Clues:

• Ditch used as a defence
• Chicago-born choreographer
• Subject of the biography 'All His Jazz'
• Winner of eight choreography Tonys
• Vehicle test round a deep ditch
• "All That Jazz" director Bob
• Drawbridge locale
• All-round defence in depth?
• Pest control device in bonsai
• 'Sweet Charity' director
• They usually encircle castles
• Water under the (draw)bridge
• Animal park barrier
• Feature of the Tokyo Imperial Palace
• Feature of a modern zoo