A passing rage (5)
I believe the answer is:
vogue
This clue might be a double definition.
'a passing' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'rage' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for vogue that I've seen before include "Popular taste at a given time" , "Current style in 13" , "Prevailing fashion" , "Fashion, trend" , "Fashion, style" .)