  Giant softening by 30 cm$^{-1}$ of the 490- and 620-cm$^{-1}$ modes is
observed by Raman scattering measurements below the Curie temperature of single
crystalline LaMnO$_{3+\delta}$ ($0.085\leq \delta\leq0.125$). A pseudogap-like
electronic continuum and a Fano antiresonance at 144 cm$^{-1}$ appear below the
charge ordering temperature. This gives evidence for the presence of an orbital
fluctuating state and the formation of a hole stripe, respectively. This is
further corroborated by a unstructured broadening and shifting of multiphonon
features with increasing doping $\delta$. Our study suggests the significance
of double exchange mechanism in the charged ordered insulating state.
