An implicit metaphor has no specified tenor, Even though the auto is present. M. H. Abrams offers the following for instance of the implicit metaphor: "That reed was as well frail to outlive the storm of its sorrows". In his e-book In Other Sneakers: Audio, Metaphor, Empathy, Existence Kendall Walton https://elliotdkosw.therainblog.com/33413313/5-simple-statements-about-metafora-explained