He does things cleanly and efficiently, never dragging things out.
Tips
usage
Can describe both physical cleanliness (a tidy room) and the way someone handles tasks (efficient, no loose ends). Often used to praise someone's decisive working style.
grammar
Often used as a complement after 得: 做得干净利落 (did it neatly), or as a predicate: 动作干净利落 (movements are crisp and clean).
