Possible Clues:

• Spell word
• "Prepare to be amazed!"
• Word to spell as it's pronounced?
• The magic word!
• Rat put into four cups we hear as rabbit pulled from hat?
• Conjuror's word
• Word that may be conjured with
• Conjuror's magic word
• As if by magic, bounder finds something to unfasten either side of him
• Trick shout