“Clean” has many different definitions. In visual terms, however, we use it to mean, “having no needed corrections; easily readable”.
WHOA! what is this “easily readable” stuff, are we are talking about drill teams? Yes, drill teams are a part of the visual performance family. This family includes, dance, marching band, step, etc. Click here for my article explaining Readability.
See this article, The Difference between Accuracy and Precision. Accuracy: the quality or state of being correct, and, Precision: the quality, condition, or fact of being exact.
Excellence: the quality of being outstanding or extremely good.
More than just the absence of error
You will notice how there are timing and technique issues, but the audience is always mesmerized and fully appreciative of the drill team’s performances, no matter what service team performs. The military service drill teams strive for audience engagement. The way you can tell is the constant use (all of the service drill teams do this) of the basic manual with slight adaptations and very little advanced exhibition rifle manual. In fact, the teams usually pick 2 or 4 soloists that have a more advanced and wider vocabulary with the rest of the team using the adapted manual.
Striving for excellence motivates you; striving for perfection is demoralizing.
Harriet B. Braiker