Related Clues:

• Bygone period
• One of the ghosts of 34-Across
• Future's opposite
• Nostalgic time
• Like some practice
• Tense description?
• Time out of mind
• History, with 'the'
• One tense
• Future of the present
• It's behind you
• Over with
• Historical
• Source of a blast?
• Days gone by