Possible Clues:

• An easy problem for the Scarecrow?
• Something requiring little or no mental effort
• That which must be done, obviously
• Toff with German name is easy to work out
• Head coach with no time for piece of cake
• Something requiring no mental thought
• Wealthy figure working in rear in feat that's not mentally demanding
• Choice that requires little thought
• Stumper's opposite
• Something requiring little thought