I am not the best expert. But I have taken clones from later flowering plants several times. I would suggest you take a clone first that you then reveg, instead of reveging the harvested plant to later clone. I think my way would be faster and more reliable.
It's called Monster Cropping, you can find articles about it. I found it reduced my clones success rate from 90% to 50%, and it went from taking 2-3 weeks to fully root a Rockwool cube, to taking 4-5 weeks with these kinds of clones.
Also after they start growing they will stall for a bit in this nasty snarl of deformed leaves and shoots all bunched together. Once it grows nodes past this it's smooth sailing and you get a nice bushy plant without needing to do much training.