It's cheap, awful potpourri (8)
I believe the answer is:
pastiche
'potpourri' is the definition.
('pastiche' can be a synonym of 'potpourri')
'it's cheap awful' is the wordplay.
'awful' indicates anagramming the letters.
'its'+'cheap'='itscheap'
'itscheap' is an anagram of 'PASTICHE'.
(Other definitions for pastiche that I've seen before include "Work of mixed styles" , "Artistic work in someone else's style" , "Artistic work that imitates another" , "Work of art that imitates the style of other works" , "Norse thunder god" .)