Possible Clues:

• Chorus singer making good time?
• Worm catcher, in a saying
• Advanced hobby, say, producing communications satellite!
• Satellite's description of Archaeopteryx?
• The worm catcher
• Journalist circling library aimlessly - he's arrived before time
• Derby rail works being the first to start in the morning
• One dealing with matters arising sooner?
• Dawn on one?
• Journalist going round library, organised one up at dawn