Can I use Aruba Central to remotely manage and use Airwave to monitor the Instant Clusters?
No. This is not possible as on date.
Both, Airwave Wireless Management Suite (AWMS) and Aruba Central fall under Network Monitoring System (NMS) and developed to serve different sectors/segments of customer base. Former is used to monitor single large enterprise or university wireless networks whereas the latter works good for distributed and wiredely spread Small Medium Business (SMB) networks.