Possible Clues:

• In the cinema in India met Ernest Hemingway across the circle
• Longest chord of a circle
• Here you need the Central Line for Circle Line
• I'm brought in to check width of bar
• Distance across, maybe
• There's a girl up the tree across there
• I am interrupting to stop bore
• In network, girl going the wrong way for Circle Line?
• Circle width
• Dear me - it disturbed part of The Circle