Temporary fashion to show every bit of violent anger (3,3,4)
I believe the answer is:
all the rage
'temporary fashion' is the definition.
The definition suggests a singular noun which matches the answer.
'every bit of violent anger' is the wordplay.
'every bit of' becomes 'allthe' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'violent anger' becomes 'rage' (I've seen this before).
'allthe'+'rage'='ALL THE RAGE'
'to show' acts as a link.
Can you help me to learn more?
(Other definitions for all the rage that I've seen before include "Fashionable" , "The in thing" , "most desirable now!" , "Very much in fashion" , "Very popular (informal)" .)