Could a cloned human being be saved?
First of all, did you ever think that we would discuss an issue such as this? It is a wonder that any person on earth cannot clearly see that we are in the last days. But, to answer your question, the Bible doesn't mention cloning, so we have to make an educated determination from what we can read.
John 1:3-4, "Through him all things were made; without him nothing was made that had been made. In him was life and that life was the light of men." From that one verse we see that nothing on earth is here for any reason other than the simple fact that Jesus made it so. No human being can possibly create life; only Jesus can. People can, and always have, worked outside of God's plan for them and done things that He would rather they didn't--that is called sin.
In that light, we have to assume that since Jesus created all life, He can save all life as well. Romans 10:13 says, "Everyone who calls on the name of the Lord will be saved."