Possible Clues:

• With 57-Across, ice cream order depicted at 31-Down
• Stiff drink for doppelganger
• Of twice the size
• Regularly curb benefit set around twice as much
• Within reach, but ultimately you'll have to oust a big shot
• Stunt stand-in
• Fetch strong drink
• Doppelgänger
• Large drink, and what you’ll see after finishing it?
• With 52-Down, betrayal, and what’s formed by each pair of the trigrams