Possible Clues:

• Miller's Willy Loman, e.g.
• Sounds as if it's a cellar for him
• He sells strange lean mass
• Famous Arthur Miller play: ` `Death of a ........' '
• Amen, lass, to the seller
• He sells lean mass, strangley
• Death of a ---, play (Miller)
• Arthur Miller wrote 'Death of a . . . . . . . .'
• Slam Sean badly for his selling
• One selling goods