Related Clues:

• Word with curtain or cattle
• "I see you"
• Essential thing
• What an umpire makes
• Reason for ringing
• It can follow the last word of 20-, 27-, 43- and 53-Across
• Trading option
• Pay a visit
• Phone
• Pen end
• Engage in telemarketing
• Ump's announcement
• An ump is paid to make it
• "You may have a ___"
• Keep in touch