Possible Clues:

• English rock band formed in 1964
• ''My Generation'' band
• Releaser of '1921' in 1969
• British group with the hit 'Substitute' in 1966
• "Won't Get Fooled Again" group
• "Quadrophenia" band
• Preceder of Jefferson Airplane at Woodstock
• Group's unlimited character to hack into?
• Group fashion infiltrates, however brief
• "My Generation" group