According to Osho, attachment is not a thing in itself but the absence of self-realization—like darkness without light. Feeling inwardly empty, we try to stuff the void with people, things, and ideas, creating fear and misery. He advises not to 'drop' attachment but to turn inward, discover your inner wealth, and then clinging dissolves naturally.
We cling because we feel empty inside; find your inner treasure and the need to hold on fades by itself.