Related Clues:

• Phases of projects
• Puts on a drama
• Apps with errors
• Almost-ready software products
• Play areas?
• Buggy versions, usually
• Places for troupes
• They're on trial
• Not-quite-ready software
• Prerelease versions
• Versions for early adopters
• Some skilled workers in 'Brave New World'
• Pre-release programs
• Versions to be debugged
• Energy in deer's legs