Related Clues:

• Flower Power era
• Hippie decade
• When there were not half a dozen of them, by the sound of it
• The number of knots that came years ago?
• Team's mounting efforts to knock off runs - time to retire?
• Hippie era, with 'The'
• 'Flower Power' era
• Decade when ZIP codes were introduced
• Great Society era, with 'the'
• Great Society era, with "the"
• 'Peace' time?
• Decade with tie-dyed shirts and miniskirts
• Number of fashion items in Mary Quant's era
• Over five accessories for this decade
• The swinging decade