Steed forced to accept disastrous live broadcast (9)
I believe the answer is:
televised
'broadcast' is the definition.
(I've seen this before)
'steed forced to accept disastrous live' is the wordplay.
'forced' is an anagram indicator.
'to accept' means one lot of letters goes inside another.
'disastrous' indicates an anagram.
'steed' with letters rearranged gives 'tesed'.
'live' is an anagram of 'levi'.
'tesed' going around 'levi' is 'TELEVISED'.
(Other definitions for televised that I've seen before include "Broadcast" , "screened" , "Shown on the box" , "Put on" .)