Hello all,
First off I'd like to apologize to any mods if bringing an outside link goes against the TOS. I tried searching for a revegging tutorial here on RIU but the closest I was able to come was a post by KP stating what I mentioned above.
https://www.rollitup.org/indoor-growing/16829-revegging.html
Regenerating is pretty much the act of cloning but your case has a little twist because you're cloning a flowering plant that has to be shocked back into veg. But I feel that shocking a small chute back into veg renders way better chances than shocking a fully grown, already harvested plant back into veg. Although people have had success doing this - it's still a coin toss. But revegging a small shoot should be more like a 90%+ herm free success rate...
Nonetheless here is a very useful tutorial I used in the past from ICMag:
International Cannagraphic Magazine Forums - How To Reveg It explans how to reveg a plant that has flowered and has already produced for you. Now I know it sounds interesting but as I've already attempted this - you will be proned for a herm. Try taking a chute off your plant and immediately dip in clean pH'ed water followed by your favorite rooting hormone. Then simply dip into your favorite medium. Trust me on this... It'll take a month before she starts to grow again. But rooting should occur as normal. As long as she's still green - you're in good shape. Sometimes this is convenient because I don't have a veg room and since they stay dormant for a month before activity begins again I don't have to look for places to store a rapidly growing plant. I just leave her in my 10gal fishtank with a cool floro. Once I'm done flowering I can move her into a 400HPS for 2 weeks and proceed to flower with a 1000HPS. It's actually pretty cool - especially when you're already flowering and don't have the space for another large plant to sit around.
Simply remember to leave lights at 20/4 - I know I know 18/6 is best but I'm a 20/4 - 24/0 type of guy...
Good Luck and Good Growing.