Possible Clues:

• Good ones can always grow better
• They take special need cutting wild grass, endlessly
• Pressman backing into barn with small cultivators
• Those working around the house?
• Adam Smith, the first of those pandering to The Greens perhaps
• People found in rows
• Adam Smith, the first of those nurturing The Greens
• Contrary Mary and others
• Brings in to store outside modern centre — their business is growing
• Awfully enraged queen's doomed 2, 5 and 7 trying to make 11 16 19 across