Yes taking cuttings in the first 2 weeks of 12/12 is a excellent way to combat the time discrepancy between when your clones are ready for vigorous growth and when your flowering crop is done. I used to do that all the time when i only had 1 space to grow in. It can take upward of a month for those clones to get their shit together and get back on the veg program.
If you are asking about saving cuttings, do you mean cutting clones but not dipping and planting them? If you take cuts and don't want to root them right away you can drop them in a ziplock bag and and mist them and close it up and put the bag in the fridge. Your not gonna get away with doing that for 2 months but you can delay for a few days by doing that. Then take them out and re-cut the stem and root them. Other than that, get a 2x2 tent and keep a mum in there. Or a 3x3 and you have room for a mum and a buncha vegging solo cups. I have clones in solo cups from my last cloning session. My flowering crop has 8 plants but i cut 12 clones. I still have the extra 4 in solo cups lol. They are little mimi me's. Stunted all to hell, but green and healthy and happy. If i could post you a pic in this i would but alas i can't. You can do a lot of weird shit with plants.