Fox Will Become Main News Source For Clear Channel By JOE FLINT Staff Reporter of THE WALL STREET JOURNAL December 6, 2004; Page B4 News Corp.'s Fox News has reached an agreement to become the primary news provider to radio giant Clear Channel Communications Inc. The pact stands to greatly boost the radio presence of Fox News, which rolled out its service last year, as it looks to compete with the much more entrenched CBS Radio, a unit of Viacom Inc., and Walt Disney Co.'s ABC Radio. Under the terms of the five-year deal, which starts next year, as many...