Information concerned with style (5)
I believe the answer is:
genre
'style' is the definition.
(genre is a kind of style)
'information concerned with' is the wordplay.
'information' becomes 'gen' (gen is a kind of information**).
'concerned with' becomes 're'.
'gen'+'re'='GENRE'
(Other definitions for genre that I've seen before include "Style (of art/literature)" , "expressive style of music" , "Category of literature" , "Particular style of art or literature, may be green" , "Writing style" .)