Possible Clues:

• What gluttons do -- covet treats with the wrappings taken off
• One may thus take too much, of course
• Have too much, of course
• Take too many courses
• Stuff found before in old tank
• Consume excessively
• As a matter of course, take too much
• Make a pig of oneself on the other side each time
• Each cutting visible as gorge
• Open river entering gorge