Pre ejaculate is different from sperm. Pre ejaculate is a lubricate that the male body created when aroused. It's the same that as when a woman gets "wet". I would just wait for his results to come back. It he had a hard on before you noticed this clear fluid, then most likely that's what it is. Guys get boners all the time. I wouldn't worry.
Just a little but it's just more clear then sperm as if it is liquid soap. Sperms isnt it suppose to be cloudy white? Is it normal to have it a pre-ejaculation?
Pre-ejaculation is color-less, basically you described it already, it's clear without any smell. Doesn't look like sperm.