Pathogen recently revealed art style (5)
I believe the answer is:
genre
'art style' is the definition.
(I've seen this in another clue)
'pathogen recently revealed' is the wordplay.
'revealed' indicates the answer is hidden within the clue (I've seen 'revealing' mean this).
'GENRE' can be found hidden inside 'pathogen recently'.
(Other definitions for genre that I've seen before include "Literary or artistic type or style" , "Writing style" , "Type or style, of art" , "Category of literature" , "Style of work" .)