Possible Clues:

• Some time back
• Back (in time)
• 'Long ___ and far away ...'
• "Long" follower
• "A long time __ in a galaxy far, far away ..."
• "Fourscore and seven years __ ..."
• "It was twenty years ___ today ..."
• 'Fourscore and seven years ___ ...'
• That's enough to give one a start some time back
• In the past referred to as one's turn