In a manner free from dirt; or so as to leave no dirt, refuse, or obstructions.

In a clean manner; in various senses of the adjective: without dirt or stain, purely, chastely, innocently, clearly, neatly, exactly, etc.

In a spotless manner; without spot or stain; immaculately. In later use often in spotlessly clean.

In a cleanly manner.

figurative. Spotlessly. (Cf. innocent, adj. 1b.)