No higher entertainment (5,4)
I believe the answer is:
floor show
'no higher entertainment' is the definition.
'floor show' can be an answer for 'entertainment' (floor show is a kind of entertainment). I am not certain of the 'no higher' bit.
'higher entertainment' is the wordplay.
'higher' becomes 'floor' (I can't explain this - if you can you should believe this answer much more).
'entertainment' becomes 'show' (show is a kind of entertainment).
'floor'+'show'='FLOOR SHOW'
Can you help me to learn more?
(Other definitions for floor show that I've seen before include "Cabaret" , "Night club performance" , "Nightclub entertainment" , "not raised performance?" , "Performance not staged" .)