Possible Clues:

• Caution
• Caution had Simon dithering
• Warn a looker about Scottish man
• Reprimand a Scots man breaking plate
• A Scotsman in a big plate to put one in one's place
• It's the turn of father to tick off the Scotsman to his confusion
• Reprimand a good-looker adopting flash name
• Warn a good-looking person about first day at work, perhaps
• Caution — a certain food keeps only half a day
• Forewarn drunken nomad prior to his collapse