cleverness
n.the ability to learn and understand things quickly. It also describes the use of skill and intelligence to solve problems or trick people.
n.the quality of being quick to learn and understand; the capacity for intelligent thought and problem-solving. Often implies a degree of wit or the ability to outmaneuver others through mental agility.
“Her cleverness helped her solve the difficult puzzle.”
“The detective's cleverness allowed him to find the hidden evidence that the other officers had missed.”
“While raw intelligence is often celebrated in academic circles, it is the cleverness of applying that knowledge to real-world constraints that truly defines a successful leader.”
From clever + -ness.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.