وَالِاسْتِعَارَةُ الْمَكْنِيُّ عَنْهَا كَالتَّحْقِيقِيَّةِ فِي أَنَّ حُسْنَهَا بِرِعَايَةِ جِهَاتِ حُسْنِ التَّشْبِيهِ
Implicit metaphor, like realized metaphor, is excellent through observing the qualities of a sound comparison.
In implicit metaphor the intended subject remains stated, while an attribute associated with the comparison image points to the concealed likeness. An unusual attribute alone cannot make the image beautiful if the underlying resemblance is unconvincing.
For instance, claws associated with death are powerful only when death's grip can suitably be connected with a predator's power to seize or tear.