Related Clues:

• Compass direction
• Endorse a check
• Leo or Libra
• Billboard
• Highway sight
• Communicate by hand
• Be rude, in a way
• First word follower of 17, 64-Across and 11, 29-Down
• Affix an X, maybe
• Make a contract legal
• Make it official
• Pencil end
• Be a director
• What a catcher puts down
• Show the way