box clever(redirected from boxed clever)
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To act skillfully and cunningly or deceitfully to achieve a desired outcome. Primarily heard in UK. The principal is already on to you, so you're going to have to box clever to avoid a suspension.
box cleveract so as to outwit someone. British informal
1950 Alexander Baron There's No Home If you box clever and keep your mouth shut…you ought to be able to count on a suspended sentence.