You’re right, the usage is too simple. & it may mean only “that” without “one”, like when refering to someone/something (feminin) that is abscent : hadik l bent (that girl), also : hadik l marra (that time)…etc.
Fnnan = Artist.
It comes from “Fann” = Art, the verb is “fanna”. & the “fann” means creating & doing something in a good/beautiful way.
However, in classic arabic, the Jahiliya era (before Mohammad PBUH), “fannan” meant that animal who people use to ride or to bring water or other stuff, which is known nowadays as “7imar” (donkey), that’s partly why i love to call all the singers/actors “fannana”.
Example: A.Sultan is a very special & unique Moroccan Fannan