Everything featured in TV programme is superficial (7)
I believe the answer is:
shallow
'is superficial' is the definition.
(similar in meaning)
'everything featured in tv programme' is the wordplay.
'everything' becomes 'all' (all things).
'featured in' is an insertion indicator.
'tv programme' becomes 'show' (a TV show).
'all' placed into 'show' is 'SHALLOW'.
(Other definitions for shallow that I've seen before include "Lacking depth" , "flimsy" , "requiring no serious thought" , "Superficial" , "Of no great depth" .)