Related Clues:

• Woman returning book for husband is not prepared
• Surprise during filming
• Improvise for sage to leave bag ladies
• Turns up father gets some freedom to speak on the hoof
• Onstage surprise
• Toastmaster's skill
• Forgo a speechwriter
• Form a line?
• Ditch the script
• Sadly, Hibs wingers dismissed as 'unprepared'
• Comment off the cuff
• "That's not in the script!" evoker
• Way to disorient one's co-stars
• "Whose Line Is It Anyway?" line
• Riff on stage