Former U.S. President Bill Clinton had New Yorkers scratching their heads last weekend (05-06May07) when he penned the clues to a magazine crossword. The ex-statesman set the challenge - aimed at the baby boom generation - in the New Yorks Time Magazine. Under the theme 'Twistin' the Oldies', it was packed with pop-culture references to the 1960s and 1970s. The website's crossword editor forewarned, "The clues in this puzzle are a little more playful and involve more wordplay than in a typical crossword. You have been warned." Clinton left office in 2001. Since then, he's been actively involved in a series of humanitarian and philanthropic projects through his charitable foundation.