Gogglebox broadcast in flight (9)
I believe the answer is:
staircase
'flight' is the definition.
(a flight of stairs)
'gogglebox broadcast' is the wordplay.
I cannot really understand how this works, but
'broadcast' could be 'air' (to air on TV) and 'air' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for staircase that I've seen before include "Route between floors" , "Means of moving from one floor to another" , "part of the mansion?" , "Way between floors" , "Situation of flight" .)