RIO DE JANEIRO, Sept 30 (Reuters) - Brazil striker Fred scored with an early volley to give Fluminense a 1-0 win over Flamengo and put them six points clear at the top of the Brazilian championship on Sunday. Fred struck in the 18th minute of the 'Fla-Flu' derby at the Engenhao from a cross by former Barcelona, Chelsea and Portugal midfielder Deco and then withstood the attacks of opponents who enjoyed more possession and goal chances. ... More...