Possible Clues:

• 'Look at that -- wine cart! How the driver stares at us ...' (E. M. Forster, Room with a View)
• Book in which to find authoritative facts
• Direction to source information
• Character of state suppressed by judge
• The character that may get one another job
• Short note showing the source of information
• Letter often accompanying 55-Across
• Formal recommendation to an employer
• Directory of information
• Respect when there's new leader? It may help if one wants a job