Possible Clues:

• It's designed to elicit a certain answer ... or where the end of 17-, 25- and 47-Across may be found
• Who'll go first?
• It's a top class grill, isn't it?
• It is, isn't it?
• After which comes the following answer?
• Outstanding dispute not allowed in court
• What is it, you're winning, aren't you?
• 1 across, 3, 6, 7 and 19 include it, 1 excludes it
• Who is in the van?
• That which prompts the answer required