Meaning of “clever” - Learner’s Dictionary

clever

adjective us uk /ˈklevər/
Jackie's really clever, unlike her sister.Dan's a classic example of a child who's clever but lazy.He was clever, attractive, and exceedingly rich.Companies employ clever tactics to persuade us to buy their products.The book's continued popularity is testimony to the power of clever marketing.
INTELLIGENT

A1 able to learn and understand things quickly and easily:

a clever student
EFFECTIVE

B1 designed in an effective and intelligent way:

a clever idea
a clever tool
cleverly adverb

a cleverly designed toy
cleverness noun [ U ]

(Definition of “clever” from the Cambridge Learner’s Dictionary © Cambridge University Press)