WASHINGTON The husband of the C-I-A agent whose cover was blown is clearing up some confusion over a comment he made to C-N-N. Joseph Wilson said yesterday that his wife, Valerie Plame, "was not a clandestine officer the day Bob Novak blew her identity." Today, he says he was only pointing out that once her identity was blown, his wife lost her ability to be a covert agent. He says he wasn't suggesting that she had stopped working undercover for the C-I-A beforehand. Wilson is continuing his attack on White House adviser Karl Rove, for discussing his wife with columnist...