Possible Clues:

• Frenchman in a grubby vest
• The Y in YSL
• Boy to see through? Absolutely!
• "Z" actor Montand
• Saint-Laurent of fashion
• Montand, Fr. actor
• Frenchman about 70, perhaps 10 less
• Hear tell of time before Frenchman
• Saint-Martin, a Derby winner
• Singer Montand