This was probably missed as it was in the wrong forum :) A suspected rogue AP is an unauthorized AP that may be plugged into the wired side of the network as opposed to a Rogue AP being unauthorized AP that is certainly plugged into the wired side of the network. The controller has not seen the Suspected Rogue on the wired network (this could be due to no traffic or the AP does not have visibility into that portion of the network) so cannot confirm it as a Rogue AP. A suspected Rogue AP will be classified using Internal heuristics/AP classification rules.
You should try to locate the Suspected Rogue as it has the potential to interfere and possibly be causing a security breach within your network. Once it has been located you can investigate further. It is not advisable to contain the suspected rogue AP (without investigation to its purpose first) as this may have legal consequences.