Related Clues:

• On the spur of the moment
• Depart from the text
• Unscripted impromptu remark
• Extemporise
• Perform in the Upright Citizens Brigade, say
• Unrehearsed concert’s boring — I’m put off
• Woman returning book for husband is not prepared
• Surprise during filming
• Remind you I'm leading on spur of the moment
• Without practice I'm on time on centre court
• Off the cuff, I'm going to promenade to put all at sea
• Improvise for sage to leave bag ladies
• Turns up father gets some freedom to speak on the hoof
• I'm bang on time with socially acceptable ad-lib
• Onstage surprise