Information regarding a category of art (5)
I believe the answer is:
genre
'a category of art' is the definition.
(I've seen this before)
'information regarding' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'regarding' becomes 're' (re can mean regarding, concerning).
'gen'+'re'='GENRE'
(Other definitions for genre that I've seen before include "Category of literature" , "Type or style, of art" , "Style (of art/literature)" , "Kind" , "Green (anag)" .)