PHILADELPHIA — Joel Embiid will have a corrective procedure this week to repair an injury to the lateral meniscus in left knee, the 76ers announced Sunday night. As a result, the All-Star center is expected to miss an extended period of time. A source said the Sixers are not ruling out a return this season. However, they won’t have a definitive timeline until after the procedure. Sixers will need collective effort to ‘hold down the fort’ as Joel Embiid recovers from meniscus injury The Athletic reported that Embiid has been diagnosed with a displaced flap of the meniscus. The lateral meniscus …