well yes but you'll half to leave a few green leafly growth at the bottem on it.
to re-veg it.

here is a pic of a re-veging plant. Its not my pic/plant.
I found it on another growing forum.

but it shows how much leaf growth you'll have to leave on it to re-veg it.

and yes you can re-veg/re-grow it and get some clones.
I did that once about 2 years ago and it worked just fine.

just leave some bottem growth on it and put the lights back on 24/7 and in a week or 2 it should grow back good. oo yah and water it really good also.
well thats what I do and it works great.

I hope this helps.