Synonyms of clever

1 Syllable
apt, sharp, smart, quick, wise, keen, shrewd, spright, deep, pro, sly, slick, good
2 Syllables
probing, sprightlier, racier, handy, witty, adept, gifted, sprightly, cunning, sapient, smartest, phenom, sager, funnier, skilled, funny, smarter, slighty, able, egghead, foxy, cagey, pretty, einstein, punning, with-it, brainy, skillful, sophic, knowing, smarted, brilliant, brainiest, brainier, expert, niftier, nimblest, funniest, whipper, wiser, nimble, canny, wisest, adroit, alert, witted, nimbler, racy, savvy, savvies, nifty, artful
3 Syllables
rational, streetwise, eggheaded, agile, delightful, tactical, qualified, percipient, masterful, proficient, astucious, discerning, astute, quick-witted, talented, tuned-in, sharp-sighted, sharp-witted, capable, well-planned, vulpine, efficient, well-versed, crackerjack, dexterous, gingery, guileful, sensible, sagacious, alerting, facetious, creative, acute, open-eyed, competent, elegant, kiddingly, ironic
4 Syllables
resourceful, diplomatic, scintillating, intelligent, many-sided, incisive, inventive, serpentine, knowledgeable, versatile, nimble-witted, recreative, fairylike, perspicacious, easy-moving, snakelike, entertaining, tongue-in-cheek, wisecracking, double-edged
5 Syllables
paradoxical, dexterous/dextrous
6 Syllables
imaginative, uncomplimentary