Of long practice or experience; veteran; experienced or skilled (in a subject or art); (slang) clever, knowing.

Knowing, cunning, wise. Also, cognizant, aware (cf. wise, adj. 3b).

Cunning, astute.

Clever, cunning.

Shrewd; clever, cunning.

Clever, cunning; shrewd, astute; nimble, active: = yepe, adj. 1.

scheming, shrewd.

Of a person or his or her attributes, behaviour, etc.: keen, shrewd, esp. dangerously cunning or clever; mischievous; capable of harming; malicious…

Well advised; discreet, prudent; shrewd, canny.

Of a person: prudent, shrewd, sagacious.

Astute.

= politic, adj. 2. Obsolete.

Of keen penetration or discernment, esp. in regard to one's own interests; shrewd, subtle, sagacious; wily, cunning, crafty.

Originally: (of a person) having or showing discernment, insight, cunning, etc.; shrewd, crafty, canny, worldly-wise. Later also: (of a look…

In early use: †Cunning, artful (obsolete). Now only in favourable sense: Clever or keen-witted in practical affairs; astute or sagacious in action…

Acute or penetrating in intellect or perception. Keen-witted and alert in practical matters, businesslike, smart; often with unfavourable…

Wide-awake, knowing, ‘fly’.

slang. Knowing, sly. Obsolete.

Knowing, wide-awake, sharp. fly to (anything): ‘up’ to, well acquainted with, clever at.

Cautious and careful in worldly or business matters; worldly-wise, shrewd.

slang. Knowing, wide-awake, ‘smart’, ‘fly’.

Astute.

Knowing, clever, cunning.

Originally and chiefly in the language of costermongers: aware, alert, savvy; cunning, crafty. Also occasionally: stylish or dapper in a way that…

British slang. Shrewd, sharp-witted; cunning; knowledgeable or aware, esp. regarding situations which may be turned (dishonestly) to one's…

Of a person: cunning, sharp.

suggestive of or resembling a varmint; sharp, cunning.

crazy like (or as) a fox: very cunning or shrewd. colloquial (originally U.S.).