Possible Clues:

• Escape route in "The Great Escape"
• Dig like a mole
• Dig (through, eg, a hill)
• Route through a mountain
• Passage recalls the French new to Brazil, for instance
• Passage or note in ditty and closing instrumental
• Goes over before Easter taking in most of the journalists with vision
• Turns up, before Easter welcoming most of the journalists with vision
• Turns up, a fair amount of the menu during a period of abstinence produced by Subway
• With 86-Across, fixation problem suggested by this puzzle's theme