As I said, successive cloning can bring it back to very close to the original thing, it may be a hybrid but for all intents and purposes on a genetic level, it is a woolly mammoth.
If cloning worked that way.
And back breeding doesn't work, it's been tried several times.
Before you bring up things like adding Western mountain lion genes to the Florida mountain lion population.... those are subspecies, one of which was so inbred that extinction was a generation or at most two generations away.
The only way to have a 100% genetic mammoth is to have a complete mammoth genome. And have a baby born to mammoth parents to avoid eppigenetic factors.
Plus, elephants and mammoths are far removed from one another... if lions and tigers can't produce fertile offspring then mammoths and elephants wont be able to. Heck, African and Indian elephants can't successfully reproduce, the only recorded hybrid that made it through gestation died 12 days after birth.
Again, Ligers are not a way to prevent tigers from going extinct.
wa:do