Possible Clues:

• Fellow's let down over drug in plant container
• Earth in this river, River Thames, primarily
• Lifted lid on philanderer, finding alternative to bed?
• Wrote flop about garden container
• Troop flew out to find a home for Bill -- or his partner
• What may hold finest marijuana?
• Container used for river grass?
• Vessel uses River Po temperature
• Twerp, fool, horrid little weed lived by here
• Vessel needing time on River Po