Related Clues:

• Go 'achoo!'
• Blessing elicitor, sometimes
• Smelling
• React to ragweed
• Allergic response
• Pooh-pooh, with 'at'
• "Bless you!" prompter
• Hay-fever sign
• "Bless you" elicitor
• Detect an aroma
• Sound while jerking the head
• [Well, see if I care!]
• Sound that might elicit a 'bless you'
• Sound of a certain bodily function
• Check for freshness, in a way