Possible Clues:

• The artist is just a little seedy
• What a seedy artist!
• Seedy enough to canvass, by the sound of it, for The Angelus
• Encountered about what's sick enough to make one seedy
• The artistic grain of The Angelus, for instance
• Cereal plant or 19th century French painter
• Cereal with small seeds
• One who painted peasants in the grass
• Cereal — French painter, d. 1875
• The painter from France seems a little seedy