Possible Clues:

• Dull feeling of heaviness joining up dots? That's the spirit in the middle of recession!
• Dull or uninteresting quality of some food
• Directed American soldier in The Rock from boat - it's awful on a full stomach
• Dull feeling of heaviness as street gets design so wrong
• Tedious formality as revolutionary spots soldier's head
• It's characteristic of high-carb food dressings to get shaken but not run
• Tossed salad without spirit has singular indigestible quality