According to Ian Rapoport of the NFL Network, the Seahawks will activate defensive end Chris Clemons from the physically unable to perform list.
Seahawks will move pass-rusher Chris Clemons to the active roster off PUP, source says. Returning from a torn ACL & meniscus
— Ian Rapoport (@RapSheet) August 31, 2013
This is certainly a good sign that Clemons should be ready to play soon.