Possible Clues:

• 'Achoo!' inducer
• White glove discovery
• Clean with a feathery wand
• Allergy trigger in an attic
• Pixie ___ (Tinkerbell's magic)
• Certain sneeze trigger
• Storm cloud?
• "Bunnies" under a bed
• 9 and __, Ruth Prawer Jhabvala's 1975 prize winner
• ''Bunnies'' under a bed