Pretty well too late, once a plant gets this far into flowering, it is very hard to get it to clone and grow healthily back into veg growth.
4 weeks ago would have been ideal timing............
Yes it is possible. Best cloning method is really your choice. But to increase rooting time and chance of a successful clone, go with a hydroponics cloner. I have seen better results with my Oxyclone DWC system then anything else.