BONDS' TESTIMONY Giants star told grand jury he used clear substance, cream provided by trainer Greg Anderson, but believed they were flaxseed oil and arthritis balm Barry Bonds told a federal grand jury that he used a clear substance and a cream supplied by the Burlingame laboratory now enmeshed in a sports doping scandal, but he said he never thought they were steroids, The Chronicle has learned. Federal prosecutors charge that the Bay Area Laboratory Co-operative, known as BALCO, distributed undetectable steroids to elite athletes in the form of a clear substance that was taken orally and a cream that...