زيد كالأسد في الشجاعة
Zayd resembles a lion in courage.
Here Zayd is the mushabbah (subject), the lion is the mushabbah bih (comparand), the prefixed kāf is the comparative marker and bravery is the wajh al-shabah (shared quality). Their explicit appearance identifies a clear simile, although rhetoric permits the omission of some elements.
The comparison asserts a selected shared feature, not equality in every attribute. The comparand may be represented as especially prominent in that feature to strengthen the effect.