Related Clues:

• Poser
• Challenge
• See 31-Across
• Interrogate
• Query
• Ask
• Grill
• Cross-examine
• Inquiry
• It may be popped
• Interrogative sentence
• Interrogate or express doubt about
• Search with one on the end for the answer to this
• The search for one on the bottom?
• You may well ask if this is the search for one on the end