Well, we, as smashers, tend to default to the word "smart" as a term used to identify the reason those who lack tech skill but are relatively successful at winning. Smart also tends to run in with that crazy word "mindgames," which means being smart could at least partially mean that one is able to see options and patterns and manipulate them to their own benefit, while staying relatively unpredictable themselves. "Smart" is really a fair term to classify any high-level smasher as, but for mid-level smashers, "smart" might mean that a player has bad tech skill but higher level analyzing/adapting skills.
This is part of the meaning, but there's a part of "smart" that involves clever decision-making, and the in-depth part of the relationship between "smart" and "mindgames." That kind of stuff would be difficult to talk about because I'm sure everyone has their own way of thinking about each term and how they relate to one another.
What do you think?