Crossword Genius

'Whaam!' is an example of this work, in part (3,3)

Ross

I believe the answer is:

pop art

'whaam is an example of this' is the definition.
(Whaam is a pop art artwork by Roy Lichtenstein)

'work in part' is the wordplay.
'work' becomes 'op' (common abbreviation for 'opus').
'in' is an insertion indicator.
'op' going within 'part' is 'POP-ART'.

(Other definitions for pop art that I've seen before include "Warhol's style" , "Striking pictures of everyday things" , "Apt pro (anag.)" , "Marilyn Diptych, perhaps" , "Creative movement" .)

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app