Clip away! Your skills are more important than a trophy.
Just last month, we had several calves at our State Preview Show. It was a pretty low key show for a full fit show, so I let the kids that were showing do a lot of the grooming. For some, it was their first time. I just smoothed up some of the wild hairs with the clippers before they went in the ring, and things still turned out all right. And the kids learned more in a morning of hands-on fitting, than they did the whole rest of the spring.