Student or Learner
Please clarify the following in red. From <<Leading the Life You Want>> by Stewart D. Friedman.
But Springsteen's hyperenergetic live shows continued to earn him fans. Jon Landau ... saw one such show. Springsteen was opening for Bonnie Raitt at a small venue in Harvard Square.
Is it saying "he was beginning the show with a song of Bonnie Raitt"?
No. It means that Bonnie Raitt was the main act but Springsteen played a short set first. In BrE, he would have been called the "support act".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.