Is the money left by the deceased brother, who used to work as a women's tailor, lawful or unlawful?

The work of a tailor sewing women's clothes is not forbidden unless it is associated with a cause for prohibition, such as touching foreign women, being alone with them, or not lowering one's gaze. If he refrains from these forbidden acts, then his earnings are good. Money resulting from permissible work is lawful, and its owner possesses it and it is inherited from him.