زَيْدٌ كَالْأَسَدِ فِي الشَّجَاعَةِ
Zayd is like a lion in courage.
The subject, respect of resemblance, and particle all occur overtly. The hearer is given an explicit, limited comparison. The kāf marks likeness, while “in courage” restricts it to a particular feature rather than every possible characteristic of a lion.
This form maximizes explicitness but limits the claim. It is not therefore defective or useless. If the speaker seeks precision about courage, the form is apt even if its rhetorical overstatement is less forceful.