French pop excessive American consumes for entertainment (8)
I believe the answer is:
operetta
'for entertainment' is the definition.
(I've seen this before)
'french pop excessive american consumes' is the wordplay.
'french pop' becomes 'pere' ('father' in French - pop can mean one's father).
'excessive' becomes 'ott' (short for 'over the top').
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'consumes' is an insertion indicator.
'ott'+'a'='otta'
'pere' placed within 'otta' is 'OPERETTA'.
(Other definitions for operetta that I've seen before include "Theatre piece" , "Make short work" , "Show" , "Short musical drama" , "HMS Pinafore or The Yeomen of the Guard" .)