Broadcast featuring opening of peep show again (6)
I believe the answer is:
replay
'show again' is the definition.
(to show a TV show again)
'broadcast featuring opening of peep' is the wordplay.
'broadcast' becomes 'relay' (I've seen this in other clues).
'featuring' means one lot of letters goes inside another.
'opening of' indicates taking the first letters.
The first letter of 'peep' is 'p'.
'relay' going around 'p' is 'REPLAY'.
(Other definitions for replay that I've seen before include "second game" , "Repeat fixture" , "another game" , "A cup tie; clip shown over and over" , "kind of race" .)