NOVELTY - A composition (C1) comprises: a) a medium comprising a solvent, functional fluid, and/or an additive concentrate; b) a friction modifier component comprising a compound containing at least one amide functional group that is not fully soluble in the medium; and c) a stabilizing component that is soluble in (a) and that interacts with (b) such that solubility of (b) in (a) is improved. The stabilizing component comprises a compound having at least one hydrogen-donating group, hydrogen-accepting group, and at least one hydrocarbyl group.    USE - As composition (claimed) used as fuel, particularly diesel fuel and/or biofuel, useful in internal combustion engines or in an open flame burner.    ADVANTAGE - The composition has improved turbidity or clarity, as defined by a lower Jackson Turbidity Unit (JTU) and/or nephelometric turbidity unit (NTU) value compared to the same composition that does not contain the stabilizing component. The composition contains high amounts of friction modifiers, and particularly friction modifiers with limited solubility in and/or compatibility with the functional fluid compositions in which they are used, allowing for the use of higher amounts of such friction modifiers in these functional fluid compositions, while maintaining the stability, clarity, and/or compatibility of the overall composition. The composition is stable, clear and/or non-hazy or has a lower turbidity compared to compositions that are identical except for them missing the stabilizing component.    DETAILED DESCRIPTION - A composition comprises: a) a medium comprising a solvent, a functional fluid, and/or an additive concentrate; b) a friction modifier component comprising a compound containing at least one amide functional group that is not fully soluble in the medium; and c) a stabilizing component that is soluble in (a) and that interacts with (b) such that solubility of (b) in (a) is improved. The components (b) and (c), or (b) alone, are present in component (a) in the form of dispersed particles having an average diameter of less than 10 microns. The stabilizing component comprises a compound having at least one hydrogen-donating group, at least one hydrogen-accepting group, and at least one hydrocarbyl group, where the hydrogen-donating group and the hydrogen-accepting group are not separated by more than 8 bonds, where the bonds include covalent and ionic bonds. An INDEPENDENT CLAIM is included for a process for preparing the clear and stable composition (C1), involving: adding components (b) and (c) to component (a) where the component (b) is present in the overall composition at a level of not less than 0.15 wt.%; and mixing the components so that the components (b) are present in component (a) in the form of dispersed particles having an average diameter of less than 10 microns.