Some pop art is annoying for devotee (8)
I believe the answer is:
partisan
'for devotee' is the definition.
(I've seen this before)
'some pop art is annoying' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'PARTISAN' is hidden within 'pop art is annoying'.
(Other definitions for partisan that I've seen before include "Arts pain (anag.)" , "Prejudiced in favour of one side" , "Strongly supporting one side" , "of prejudiced views" , "Devoted to a cause or party" .)