Possible Clues:

• 'Just a sec'
• Wait a bit!
• "Wait a minute!"
• Informally, just a mo', or don't let go
• Telephone line?
• Keep one's grasp or maintain telephone contact
• Cling to or informally stop a mo'
• "Just a second!"
• Cling to - or stop right there
• Wait a moment - cling firmly