Possible Clues:

• One not favored
• Cook lightly bit of gristle? Such is unlikely to succeed
• Poorly grounded person not expected to win
• Someone at a disadvantage and likely to lose
• Loser grounded after trouncing
• Don't cook enough gruel, initially, for the probable loser
• When one wins, it's an upset
• One at a disadvantage
• Sportsman unlikely to win grounded in disarray
• Organisation attached to the German boxer who isn't expected to win