Possible Clues:

• Practical application of science
• Sleuth on heroin has no record at the Yard; this shows how it's done
• Machinery moving the only cog
• Dance music on record requiring unknown application of science
• Application of practical science to commerce or industry
• Science college has no record by end of day
• *Science in industry
• Modern applications old amid lengthy company development
• The only cog struggling in applied science
• Application of tools and methods