All the same this show certainly isn't (7)
I believe the answer is:
variety
'all the same this show certainly isn't' is the definition.
'variety' can be an answer for 'show' (variety is a kind of show). I am not certain of the remainder of the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for variety that I've seen before include "It's said to be the spice of life" , "Type; stage genre" , "Sort, type" , "class" , "kind of show" .)