Readers initially commit a sin, somehow identifying Byron's style (11)
I believe the answer is:
romanticism
'style' is the definition.
(I know that Romanticism is a type of artistic style)
'readers initially commit a sin somehow' is the wordplay.
'initially' says to take the initial letters.
'somehow' indicates anagramming the letters.
The first letter of 'readers' is 'r'.
'commit'+'a'+'sin'='commitasin'
'commitasin' with letters rearranged gives 'omanticism'.
'r'+'omanticism'='ROMANTICISM'
'identifying byron's' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for romanticism that I've seen before include "Wagnerian movement" , "Art style" , "Eighteenth century artistic movement" , "Sentimental feeling" .)