هَذَا الشَّيْءُ كَالْمِسْكِ فِي الرَّائِحَةِ
This thing is like musk in fragrance.
Hādhā al-shayʾ is the subject, al-misk the model, kāf the particle, and fī al-rāʾiḥah the explicit ground. Two individual terms are compared in a single respect.
Additional descriptive qualifications do not automatically turn a simple term into a composite scene; what matters is the structure of the resemblance.