Which adjective would describe a situation where something is not easily apparent?

The adjective that best describes a situation where something is not easily apparent is "latent." This term refers to qualities or characteristics that exist but are not immediately visible or noticeable. In various contexts, "latent" can imply that there is potential or existence beneath the surface, which may require further investigation or insight to be revealed.

The other options convey meanings that are contrary to the description of something being not easily apparent. "Obvious" suggests that something is easily seen or understood, while "clear" indicates a lack of confusion or ambiguity. "Transparent" also implies that something is easily recognizable or comprehensible, conveying openness and clarity. Therefore, "latent" appropriately captures the essence of something that is hidden and not immediately observable.