Possible Clues:

• Put one's name to picket leading to Dublin or Galway
• Point out initial letters
• Clue good being placed in wrong job
• Pointer at a crossroads
• Reporter's function and job, one giving direction
• It shows us the way to authorise mail
• Direction guide
• Indicator by the way in initial letters?
• Useful pointer for motorists?
• Indicate the last job typist wants boss to do today?