Box clever
Definition 1 of 2
Pro Tip 1/3Metaphorical Use
The phrase is often used metaphorically, beyond literal boxing contexts, to imply clever tactics in everyday situations. 
When dealing with negotiations, it's crucial to box clever.
Pro Tip 2/3Subtle Tactics
Implies using indirect or subtle tactics, not direct confrontation or force, to outsmart someone. 
She boxed clever by outsourcing work, freeing up her schedule.
Pro Tip 3/3Cunning Required
It suggests a degree of cunning or shrewdness when facing complicated problems. 
To beat the competition, we need to box clever.