Possible Clues:

• Hide, if virtually broke
• Scrape, as one's knee
• Tattoo artist's "canvas"
• Goes w/Foo Fighters' "Bones"
• Hide this to a relative extent below the South
• Protective covering is missing from a finch
• It may be thick or thin
• Covering? Having 7 I'm on guard
• Auden seemed to think there was a dog under it
• Concern of dermatology