Clarus was an oracle of Apollo. In poetry, it symbolises divine insight and the quest for guidance from higher powers.

Clarus housed an important oracle of Apollo in Ionia, where the god delivered prophecies through his prophet who descended into a cave, drank from a sacred spring, and delivered verses in response to questions. This sanctuary competed with Delphi and Didyma as a major oracular site, particularly during the Hellenistic and Roman periods. For students studying Greek religion and prophecy, Clarus represents the diversity of oracular sites and the various methods through which Apollo communicated divine will. The spring-drinking ritual differs from Delphi's vapor-breathing Pythia, demonstrating varied ritual practices across sanctuaries. References to Clarus in poetry invoke prophetic authority, the obscure pronouncements of Apollo, and the human desire to know future events. The site's associations with poetic inspiration (Apollo as Musagetes) also made it symbolically significant for poets invoking divine authority for their own verse. Understanding specific oracular sites enriches interpretation of prophetic passages and divine communication in Greek literature.