TV programme broadcast about hospital (4)
I believe the answer is:
show
'tv programme' is the definition.
(a TV show)
'broadcast about hospital' is the wordplay.
'broadcast' becomes 'sow' (sowing is a kind of broadcasting).
'about' is an insertion indicator.
'hospital' becomes 'h' (abbreviation for hospital on maps).
'sow' placed around 'h' is 'SHOW'.
(Other definitions for show that I've seen before include "Demonstrate or reveal" , "Demonstrate - parade" , "Entertainment - guide" , "Expose" , "Demonstrate; spectacle" .)