Possible Clues:

• Intelligent person's aberration, ignoring the odds
• Oz scarecrow's desire
• Support at home for Einstein?
• Intellectual capacity to broadcast, initially as a rule, on the radio
• Seat of the intellect
• Intellectual support following fashion
• Scarecrow's quest
• The Scarecrow's desire in "The Wizard of Oz"
• Scarecrow's wish
• 1 Across member