Possible Clues:

• Dreary River Oise breaking over motorway
• Ho-hum
• Tedious
• Boring clothing that's sported around agricultural county
• I see a worm cast, it's pestilential
• Aggravating to put on when I have had a few
• Tedious sport certain to overwhelm one
• I see a worm turn when it is tedious
• I see a worm turn — it's so boring!
• Humdrum people generally stand to receive instant backing