Possible Clues:

• Mark embraces American to show support
• Support American volunteers beset by wickedness
• Slur about Guardian Bear
• It's up to us to mark this and keep it up
• Bear the weight of
• Mark keeps place for four in hold up
• As it is packed in light container, carry
• Support American backing up smear
• Wrapped in paper, it's a knitted bear
• Get us back with a bad mark and keep it up