Pop art? (4)
I believe the answer is:
dada
This clue is a double definition.
'pop' is the first definition.
(synonyms)
'art?' is the second definition.
(Other definitions for dada that I've seen before include "modern artistic movement" , "Precursor of surrealism" , "Pop" , "Irreverent Twentieth Century art movement" , "Nihilistic 20th-century European art movement" .)